This will be my first real project, all this talk of LM317's and such just zooms straight over my head.
Let me rephrase that; anyone have a suggestion for a nicely predetermined power supply project
If for some reason you don't want one of the ones on ebay, then reference Pete's specs - 48VDC switcher supply at ~0.38A, if memory serves. Pick one out and then come back and ask in this thread. I'm sure Nate or Pete can confirm it as suitable or not.
Note that even the original $6.99 versions didn't count shipping ($7?) and a power cord, so $20 total from a current ebay seller listing is not that far off.