If you heard Pidgin has a support for Google Talk and are disappointed for not having it in your Kopete, don't worry you have a way out. You can configure your kopete to work for Google Talk just like you do for Yahoo, MSN, AIM or others. Here is a how to to make things happen for you:
Select Accounts from the left navigation bar.
The screen should appear like this one.
Choose Jabber and click Next.
The next screen should be like the one shown below:
In the Jabber ID, enter your complete google account ID. For eg, I would enter firstname.lastname@example.org for me. Choose Remeber Password as per your convenience. In case you choose it, provide Password in the TextField. Similarly, you can choose Exclude from connect all and Exclude from Global Identity as per your convenience.
Now, choose Connection tab. It should look like this one.
Check Use protocol encryption (SSL) and Override default server information. Type talk.google.com in the Server TextField. Keep Port to 5223. Click Next.
Choose color for your google talk ID. Click Finish button. You should find yourself online if you are connected to internet connection.