More and Less. Automatically concealing some of the page content makes sense when there's a lot of it or on smaller screens. It's not always ideal, though, and can be clunky when there's not much content. We're looking at this feature closely but, you're right, it's not part of our beta testing so it may be a while before it's improved.
Categories. The categories you see in the grey navigation bar are from the BBC's ontology for programme pages. We don't control the underlying classification or the labels used. I'm sure you'll understand that a single, shared classification for content is very useful - allowing us to connect together related content from different parts of the BBC - but the trade-off is that it can be a bit inflexible for individual brands. We're looking at the list of categories and at the order they appear in.
Carousel. Can you explain this one in a bit more detail for me? I'm not sure what you're referring to.
And, although I'm not familiar with the output of Radio Venice, it might be worth saying that providing 'now playing' information for a station where most of the music comes from CDs is quite easy. Radio 3's 'problem' is that a very large proportion of our output is live or specially recorded (600 concerts per year, remember). Given the difficulty of attaching 'now playing' data to output from an Outside Broadcast truck, I think we're doing pretty well. Big improvements are in the works, though, as we upgrade our systems further. Watch this space!
Piet, I understand that there are no plans to update the international homepage at the moment.
Briantist, you can't currently set your location on the beta homepage. You'll be able to in later versions. James Thornett, head of the homepage, has more in a comment on his post for the BBC Internet blog. And CBeebies is included in knowledge because that's where it lives in the BBC's organisational structure. I know that the homepage team will be looking at the organisation of content areas on the page during the testing period.