Does anybody know a way to programmatically send SMS messages over the Internet?

[errantember]

I've got a setup where I get chat messages on my work computer, and I need to be able to forward them to my phone. This normally easy task is complicated by the fact that the work machine is on a VPN network, and doesn't have direct access to the Internet. I need two-way communication for this to be worthwhile. Any ideas about how to make this work?