Koen,
Is there any chance you could provide md5sums for the files listed at
http://www.angstrom-distribution.org/demo/beagleboard/
I just spend 2 hours chasing what looked like a bricked beagle. It was actually due to a truncated MLO on the MMC, that was subsequently written to NAND. The two instances of broken MLO (nand and MMC) caused me to think I had bricked the board because it obvioulsy was unable to boot from either mode.
Regards
John