New: Google IM

Google Talk is being launched today, offering instant-messaging *and* computer-to-computer voice chat, the Associated Press reports. Where teenagers are concerned, it won't be easy for Google to get entire peer groups (or schools) to switch from AIM or MSN Messenger, because it's social groups not individuals that determine what service teens use. But adding a phone-like feature might make it easier for young multitaskers to make the switch. So far Google Talk only works on Windows XP and 2000 PCs, not Macs, but users of Apple's iChat can talk with Google IM-ers, according to Good Morning Silicon Valley, and Google Talk also works with Trillian IM. Here's coverage by CNET and the San Jose Mercury News.