For those of you who aren't up on the latest in internet telephone services, Gizmo and Skype are internet telephone services. You can call other users on their services for free, and for a small fee make outgoing calls, and accept incoming calls if you rent a phone number from them. They also have basic IM services built in.
So why do I like Gizmo? It uses open standards and I'm a geek for that kind of stuff. The interface also seems quite nice and it runs on everything (Skype does too). It also offers some features for free that cost money on Skype (like voicemail). So if you are doing the internet telephone thing I highly recommend giving it a try. You can give me a call at gregoryblake.