The PodcastHotel. (http://www.podcasthotel.com).
Feb 20/23 (2 weeks from now!) Seattle, WA This would be good for PR and the kind of event I'd put in the "to peek at cool new trends" folder. Craig Newmark (craigslist) and Chris Pirillo (lockergnome) speaking, Bryght (Roland Tanglao and friends) doing the tech.
It's cheap (50$) and promise to be quite a good source of ideas.
Last but not least it's in "evil" seattle and I guess lot of people from Microsoft and near Vancouver will join.