Innotech, the company that makes the spitfire units is a leader in the IR control world, with code and learning based universal remote controls. They added the spitfire line of PC controlled IR distribution to allow home automation enthusiasts to distribute IR from basic serial port communications.
It has IR emitters built into it's front panel, and also has emitter output jacks on the rear. Its designed for DIY home automation folks like the crowd here, i'm shocked so few people knew about it.
There's of course also control software with the package (VB).