Straight from his site:
5/5/09: Happy Cinco De Mayo! Anyway, at the moment, it doesn't look like I'll be selling any drivers starting tomorrow like I may have said. This is because I've unexpectedly run out of PCBs that I can use for the drivers. I'm currently talking to a manufacturer about getting the drivers factory assembled and have been waiting to hear back on an estimate. The good news is that I MAY have PCBs soon if the manfacturer is able to make more for the assembly. I hope to know sometime this week and will update this page when I have more information.