I've put up a freshly built Geo::Coder::US DB file for download here:
It's 384MB compressed (845MB uncompressed), but believe me, you'd much rather download this than download the 6.6GB of TIGER/Line source files needed to build it!
Supposedly I've got 6TB of downstream bandwidth each month at my ISP (Dreamhost). I guess we'll see if they meant it! I should hook up something to take down the file automatically if I go over my limit...