I joined DIYC in February of this year. At the time, I had a 48-channel setup that used a mixture of Velleman K8055 USB boards and two parallel ports, and it performed extremely well -- although it had only blinky capability. It was also fairly maxxed-out and couldn't realistically be expanded past that.
I am much happier now with what I've constructed over the past 10 months though my associations here at DIYC and I just wanted to voice thanks to a number of people. I'll probably forget one or two and to them, I apologize. But I wouldn't be sitting here with more than 500 dimmable channels available without the help of the following -- in no particular order --
Scorpia, Phil Short, WayneJ, Budude, Wjohn, Wwnf911, Macrosill, Rstehle, Brad Riley, Greg Bartlett, KC (of course!), WakeFan, RavingLunatic, 51FordF2, Lightman, Frank Kostyun, WireWrap, Photovor, Aurbo99 and LabRat.
I thank you all from the bottom of my blinky...er...heart. This is really a great hobby!