As to personnel, I'm happy to take an active rôle in the UK Foundation; David has said that he'd rather take a more back-seat affair (non-exec. Board member, perhaps?); others?
I definitely want to be involved but not in any high profile way, for two reasons - I'm not currently living in the UK, and I'm hoping to remain on the Board of the Foundation for the coming two years.
One VERY important thing is how to make it as clear as possible, under UK law, that "Wikimedia UK" has no control whatsoever over Wikimedia or over site content. Otherwise we will be a target for every crank, nutter and serial litigator in the country seeking to use the UK's appalling libel laws to their advantage.
Absolutely.
For those not following the progress of the other chapters, the French Wikipedia has had a little trouble recently related to the President of their chapter deleting an article following legal threats about it. This action was highly controversial, despite him feeling it was backed up by their chapter's bylaws. Their bylaws state that they are legally the representatives of the Foundation in France, and therefore they do have legal responsibility for the content. In hindsight, this is looking more and more like a bad idea, and I would strongly advise future chapters to avoid such clauses. Having the chapter separate from the actual projects is a much safer and simpler approach. This also goes for legal ownership of any hardware in the UK, and possibly even the UK domain names.
Angela.