So in general, we're looking at $20 for mouse + keyboard combo, and maybe $10-$20 for 2GB+ SD cards.
The 1A power brick seems excessive, since the R-Pi provisional specs assume ~1W draw, at 6-20V; at 6V, this should basically be 200mA or under. 5V 1A is a bit too much, unless you want to attach it to a power strip and run a small touchscreen display and a few other things.
Also, I'd much rather use a battery than a direct PSU to power the R-Pi. Considering its 200mA 6V consumption, a 7.4V 6Ah could run for, what, 30 hours straight?
Er... as for the hair cut thing.... is this some trick that people learn in their Economics class or something? Sorry, but it seems so random (and an amusingly simple yet effective method) that I feel like it really either is a joke, or is some kind of ancient wisdom. 8O