I couldn't find the slashdot desk email so i decide to inform you that it would be great if you can post my article as anonymous.
Just the one that came with them
I'm using one power supply scrounged from an old external hard drive, and another I bought at the Goodwill computer center the other day specifically for this purpose; they're both 12v (needed) and both somewhere in the 2.5-3.5A range.
Yes -- that's what I'll probably do, actually. When people come to visit, I can set them to blink, and tell them to look for the blinking lights, too
I also think they're somewhat of a burglar deterrent, because they brighten the whole area of the door.
The only problem with being a man of leisure is that you can never stop and take a rest.