As posted before, uControl makes remapping troublesome analphabetic keys easy, e.g., putting fn keys back into usefulness and killing the caps lock, though it does require you to be utterly up to date, Panther-wise.
Jonathan also mentions the importer of some industrial design porn [link fixed] from Japan: titanium/aluminium Powerbook and iBook stands that solve heat buildup problems and which echo the seemingly unkillable trend of vertically-oriented food in restaurants.
The heat under the left handrest can be reduced by NOT unchecking, as I had done, the option in the energy saver preferences pane to ‘put the hard disk to sleep whenever possible’ while the power adapter is connected (thanks to Marshall Sokoloff for pointing out that the disk, not the processor, is in that spot).
The glowing sleep light can of course be covered with white electrician’s tape, much in the same way that the television screen can be painted black whenever a Jude Law movie comes on.