Tyler writes in about a neat key remapping app:

it's called uControl, and you can swap modifier keys (i.e. capslock-> control, etc), allows *book users to hold down the function key to make their trackpad function like a mouse wheel. and perhaps the most *sounds like a weird thing to do, but i use it alot,* ability, if you hold down the spacebar, the keyboard mirrors, so you can type one-handed (i.e. spacebar-f -> j, spacebar-s -> l, etc). very handy if you have two machines on the same desk.