very cool!!! but WAY too much time on their hands!!!!
Hey i resemble that remark
I actually did that last year. I only had 5 channels though (simple parallel port interface). This year i actually built two 24 channel controllers, but didn't have time to set it up. I finished soldering up the controllers and hanging the lights, but didn't get the control wires ran or songs programmed.
I'll have to get on it earlyer next year. I always buy about 20 strings of lights day after xmas when they are 75% off.
Look for my video next year
all the info you could want on the DoItYourselfChristmas.com forums.
BTW those 2 vids you posted are probalby running about 1000 channels. that little tree has about 30 ch on its own. for reference, a populated 24 channel controller will run you >$75