I'm currently using Blag to satisfy all my pre-linux demands, with one glaring exception.
I often have to reboot into Windows to make international phonecalls using the excellent service provided by www.callserve.com
This enables me to call my relatives who are scattered around the world at very cheap rates, without them needing to use a pc. (Most of them are technically inept, to say the least!)
Is there any similar service available for Linux users, so I can kick my Windows partition into touch for once and for all?