Well, a company named ZIP ZIP finally made a lego usb brick in the form of a 2x4 brick. It's 1GB big, but wears a hefty pricetag of aus $59 (roughly $49 us bucks). I'll rather make my own, just like Brett.
Original Gizmodo article...
Heh i also putted my USB key in a brick because the old housing was so busted. You can see it here: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=238692
Its nice Lego made an USB key, yet it really looks expensive!
if they didnt ask Lego for rights, Lego can sue them...
I think the fact that they must pay for the license adds to the steep price of it.
This usb stick is not from the lego company. As stated it's from a company called ZipZip .