I'm not sure when it came out, but it has been within the past 2 weeks.
The new version of GTalk looks like a pretty extensive overhaul. Maybe that means it will not drop the connection as much and will re-connect.
Either way, so far it looks great!
Pick it up by pointing your blackberry browser to
http://www.blackberry.com/googletalk. Follow the prompts and there you go!
Enjoy!
--mobrien118