Jimmy Wales, the founder of the free, non-commercial and open source Wikipedia is here in Bristol today to give a talk. This year is the 10 year anniversary of Wikipedia, so he'll be talking about this milestone and the future of the project.
The talk is sold out (well it was free to go, but you need a ticket) but having been to such free events before there are always a few seats left at the end as a few people don't turn up. It's at 12.00-13.00 at Victoria Rooms, University of Bristol.

However there is also going to be a live stream of the event you can watch for free too:
http://www.ustream.tv/channel/brrism---bristol-social-media

If you are on twitter, the hashtag for this is #wp10

Thanks