There seems to be some confusion.

Spotted on the Rails mailing list:

Re: RailsConf in London
So? Is Jim Weirich coming or not?
YES: http://europe.railsconf.org/articles/2006/05/03/announcing-railsconf-europe
NO: http://skillsmatter.com/menu/255

The answer is YES, I will be there. I was a late addition to the list and my name might not have made it into the announcement from Skills Matter.