GitCastsI am Scott Chacon, and I started GitCasts to help teach people what Git is and how to use it.Partial Updates May Create Invalid RecordsRails 2.1 will do partial SQL updates. This will improve performance, but it has the potential to create invalid records. Two update queries can each change an attribute that in combination makes a record invalid.Action MessagerActionMessager is a simple framework for creating IM-based notifiers. It is structured like ActionMailer, so it's got virtually zero learning curve for most rails developers.WorklingA rails plugin that integrates starling into your rails app to allow asynchrous tasks in ruby on rails.Ask Your Doctor About mod_railsI was initially skeptical about mod_rails. The developers had the cojones to start promoting it weeks before it was ready, and they managed to generate a lot of hype around it before anyone had used it.