OK, so it’s Tuesday night, just before the main event – Web 2.0 Expo – and what’s a social net butterfly like you doing to get ready for the show? Sitting at Starbucks, tweeting from your iPhone? HELL NO! You’re coming to TechWeb’s Warmup Tweetup. That’s right! Please join Web 2.0 Expo co-chair Jen Pahlka, community manager Janetti Chon, and TechWeb’s David Berlind for some conversation, networking and filming. Yes, filming. David is hoping to capture a few demos to be published as ReviewCams (demos) on InformationWeek.com. See you there! Cash bar but the WiFi is free.