Wanna try gtalk over linux!!!
Try out empathy.
I have tried on ubuntu 8.04.
Check out the post on ubuntu forum on how to install empathy,
There are few problems which are solved when I upgraded to 2.24.0.
when creating account empathy (configuring for your google account),
– don’t miss @gmail.com in the login id
If you got any issues follow the instructions in http://live.gnome.org/Empathy/Debugging to check the logs/outputs.