Now that wherecamp5280 is out of the way for this year, I'm getting excited about organizing FOSS4G 2011 here in Denver next September (in case you missed the news, I'll be the conference chair). This will be a rather larger event - we're expecting 1000 or so attendees.
I walked down to the Sheraton in downtown Denver the other day to take some pictures for marketing purposes (for the web site and brochures, etc), and I really think it's going to be a great venue for the conference. Here are some pics ...
All the conference sessions will be within the hotel itself, and a large new bar connected to the hotel lobby is nearing completion, which will have 130 different beers on tap (I will try to do my conference chair's duty and sample all of them once it opens, later in December!). So that should all be conducive to great socializing and networking. Right across the street there's an excellent assortment of reasonably priced "fast but fresh" food places, so loads of convenient food options very close by, though of course the conference will be well catered! Plus there are literally hundreds of bars and restaurants within walking distance - the location gets an outstanding score of 95 for walkability at walkscore.