Just tried the site with my iphone 4. It guessed my location correctly and pointed out French lessons that are happening nearby right now. Cool! I'd like it if

Just tried the site with my iphone 4. It guessed my location correctly and pointed out French lessons that are happening nearby right now. Cool! I'd like it if there was a way to list events happening 'today' and also 'this week' in my area. I'm not sure if the ability to post my own event is relevant to me, since I doubt any HN types would happen to be on your site for that one hour I was free for lunch. I think this is a similar problem for location-specific services like http://messageparty.net/ http://messageparty.net/ as well. How do you hit that critical mass where there are enough people online to make a spontaneous connection?