I've been noticing the integration on gmail, of both Gtalk's chat, with the search and archiving abilities of google.

It's actually a pretty cool setup.  But the best review of the new integration, and suggestions of how best to use it, is at the Unofficial Google Weblog.

The three main ways of communicating with someone - email, Instant Message, and Talking - are now provided through the same interface.  That's pretty cool!

NOTE:  This is probably going to be a tech enthusiast day, for posting...