"u-boot.bin" -> "u-boot.img"
It looks like the newer builds look for the filename to be u-boot.img, which is the filename at http://www.angstrom-distribution.org/demo/beagleboard/. I tried renaming the file to u-boot.bin just to test and it failed. So in a few days I'll make that correction to keep the wiki up to date. Open to comments, though. --spazvt