Tonight we launched release 6.0 of the Yahoo! Messenger client! Going live to the web at 6pm this evening, this was a different sort of product launch than I'm used to, but it's definitely cool. I've only been here a month, so haven't really contributed to this release at all. But, it's been a good learning experience to watch the very end of a release cycle. Here's a quick rundown of the new features: LAUNCHcase Radio — integrated into the IM client Yahoo! Games — integrated into the IM client Yahoo! Avatars Display Images Audibles — send talking animated characters…