castle79: you'll already have seen the technical details re Wikipedia integration on Tom's post that Nigel pointed to above. To answer your question re the mechanism for avoiding bad edits: essentially we're relying on the Wikipedia community to deal with any vandalism in their usual timely manner, augmented by our own users who we encourage to click through and help if they feel strongly. Because we are updating pages in real time, we are confident that any bad edits will not be on our pages for long. In the event that this assumption proves unfounded and there is a high profile problem, we can suspend the Wikipedia biography for a given page.
acotgreave: as Nigel said, we aim to aggregate more and more BBC content over time and this would include details of archive sessions. However, I'm afraid it's unlikely that everything from the archive will be made available for free on bbc.co.uk. Such content has a commercial value, and the BBC through its commercial arm, BBC Worldwide, has an obligation to seek opportunities to exploit its archive commercially. This is partly in order to avoid negative impact on our competitors in the marketplace, and partly due to the nature of the rights we acquire from artists and labels, among other reasons. Having said that, there's a balance to be struck and we're actively exploring where that balance lies.
coxy: you'll have see the response from Tom Scott on your own blog post re Last.FM integration and some of the problems we're facing there. But I would also add that in the long run we are keen to link and aggregate to the best content avaialble on the web, within the bounds of rights, editorial policy and so on, and Last.FM would certainly fall into the latter category for us. As much as anything else it's a question of time. I'd reiterate that what we launched last month is very much a first step.
I hope to post a progress report later in beta, and certainly when we make the pages fully public.