Stickman has a pretty spiffy homemade LEGO flash drive – “It uses a 128MB Dick Smith electronics USB flash drive. The casing of the DSE drive was easy to remove and from there it was a matter of resizing the circuit board (it was slightly too large to fit inside a 2×4 Lego brick) by sanding down the edges. I cut out the inside of a yellow 2×4 block (had to be yellow or red!.. the traditional lego colours but decided yellow looked cooler..) and resized it by cutting off part of the bottom so that it was the size of two flat 2×4 plates stacked on top of eachother. “ [via] – how to & gallery.
Update: Here’s another one – USB Flash Drive by Spiked Mods – Link.