MoBiLiS iN MoBiLi

Just try this command-line parameter:

googletalk.exe /nomutex

It's cool, isn't it?

Also there is a very interesting post on NeoWin.net on how to do conference calling with GTalk, It's a chain relay trick.

How to conference call:
Open up a copy of google talk on all computers with which you wish to conference. After one copy is opened make a new shortcut for google talk but at the end of it add /nomutex. If you installed it to the default folder then your shortcut should read “C:\Program Files\Google\Google Talk\googletalk.exe” /nomutex. Open 2 instances of the software on every user’s computer. After this start a chain: User 1 should connect on one instance to user 2. User 2 will connect on his second instance to user 3. User 3 will connect using his second instance back to user 1. With this chain everyone is connected to everyone.
Possible problems: Google will try to connect you with others on the same instance. To fix this just open a new instance. It seems that google will try to take calls on the newest IM client.
Note: You can also make a conference call with more people, just have need to have one less instance than the amount of people that exist.
http://www.fluxiontech.com/?p=64