My friend John Popham has a project:
http://johnpopham.wordpress.com/2011/12/16/introducing-celebration-2-0/
in which he is offering free live audio & video coverage of events. I can vouch for his expertise and good standing.
I suggest we find a suitable Wikimedia UK event at which we can deploy this - one with lots of people and activity.
Can anyone suggest something? Perhaps in Monmouth?