The best program I've found for sending texts to friends while working on my computer is gtalksms. I'm using a version older than 3.3 so I had to create aliases because it was the fast way to send messages and have the program find the name.

Link:
http://code.google.com/p/gtalksms/

Just P2V Win7? Only one problem! You'll get a STOP 0x0000007B on boot. With automatic reboot on error enabled, it also manifests itself as a Windows Boot Manager error, Status: 0xc0000225, Info: The boot selection failed because a required device is inaccessible ( Read more... )