Technology firms seek government surveillance reform
The fact that eight technology giants which are normally bitter rivals have united to condemn the extent of government surveillance shows just how strongly they feel.
In part, this reflects the libertarian thinking that permeates Silicon Valley - but there's also a commercial aspect to their concerns.
Around the world, consumers and governments have begun to question how safe it is to use American technology products, and in the words of Microsoft's signatory to the letter "People won't use technology they don't trust."
The companies have prided themselves on the security of their customers' data. Now they have had to concede that governments have wide access to that data - and they are vowing to use strong encryption to repair the holes in their defences.
But don't expect the intelligence agencies to sit back and do nothing - the scene is set for continuing conflict between the spies and Silicon Valley over control of the internet.
Tagging your world
He's the man who built one of Britain's most successful software businesses, reaped a huge fortune when it was sold to Hewlett Packard - and then went to war with the American company over what Autonomy was really worth.
Now Mike Lynch has put some of his money into what could prove a really innovative software venture - but one which may signal more conflict with HP.
Universal credit - an IT fiasco?
It's an ambitious plan to transform the benefits system - but it looks as though the technology meant to power universal credit is turning into another great government IT disaster.
This morning the work and pensions secretary Iain Duncan Smith told the BBC that the planned 2017 deadline for the programme would probably slip - although the DWP statement still talks optimistically of the continued "safe and secure roll-out" of the scheme.
Bitcoin virtual currency breaks $1,000 mark
It has been an extraordinary year for the currency, which attracts disciples and detractors in similar numbers.
Back in January, when only a dedicated band of libertarians and uber-geeks knew much about it, one bitcoin was worth under $20 - but as people began writing about its attractions, the value soared.
The Bitcoin bungler - a salutary tale
Here's a cautionary tale for anyone thinking of climbing aboard the Bitcoin bandwagon. You could lose your entire investment in a moment of carelessness. Then again, you would have to be as daft and forgetful as me.
Here's how it happened. Back in the spring I acquired some Bitcoins - well about half a Bitcoin - to carry out an experiment on behalf of Radio 4's PM programme. I wanted to see how easy it was to use the virtual currency to buy something real - in this case a pizza.
Consoles: One box to rule them all?
A titanic battle for the living room is under way, as Microsoft's Xbox One and Sony's Playstation 4 try to offer us the all-purpose device that will give us all the entertainment we need. The convergence we've been told about for years is happening and it looks like a games console.
Well, that has been the narrative for quite a while - but I'm not so sure it is true any more. I've a hunch that the quest to produce one box that will be all things to all people may be doomed to failure. Or at least may end up as a minority pursuit.
Global launch for Microsoft Xbox One console
Both consoles seem destined to do well - but neither is likely to replace all the other boxes under the TV in most homes. Whatever the industry may tell you about the ever widening audience for games in all their forms, many people just won't want an Xbox or Playstation controller to be their route into a night in front of the telly. And having tried the Xbox One's voice control, it is clever, but in my view not quite intuitive enough to persuade an older person like me to throw away the remote control.
Making a friendlier Raspberry Pi
In an office deep in London's trendy Shoreditch, Alex Klein is engaged on a mission. He's assembled a small team - an Israeli, an Italian and a smattering of recent Cambridge maths graduates - to address an important task. They are trying to make the Raspberry Pi more user-friendly.
Mr Klein, a former journalist, had his epiphany while he was trying to set up the cheap educational computer for his seven-year-old cousin. "It was totally impenetrable," he says. "The Raspberry Pi for Dummies guide was 400 pages long. It's an incredible piece of tech, but it's something that needs to be unleashed for normal people."
Chatting With Mr Snapchat
He's 23, he dropped out of Stanford, and his start-up is backed by some of the biggest names in Silicon Valley venture capital. Evan Spiegel, founder of Snapchat, could be the next dotcom billionaire from central casting - but only if he's right that people will pay for a social media experience.
Snapchat - for those of you who are over 25 - is a wildly popular mobile app that lets users communicate by sending each other photos which automatically delete after a few seconds. When Evan Spiegel visited London this week - his first time in the UK - he came and gave me a demo.
Could we hatch a British Twitter?
For Jack Dorsey, Ev Williams and Biz Stone these are heady days. A plan hatched just seven years ago now looks certain to culminate in a triumphant stock market debut for Twitter this week.
But I've been gnawing over two nagging questions. How did Twitter's co-founders, who never seemed that sure what kind of business they wanted to build, end up with the right recipe? And why don't we in the UK seem able to produce similar companies?