They said they have to add infrastructure first due to high demand. I was able to download it before they shut it down. And I'm not really sure what I'm looking for other than something that's prettier than Vista with the performance as good or better than XP - and apparently that's exactly what it delivers.
Yeah, they haven't put up the key registration site yet either. It can still be installed for 120 days without a key tho.
http://tech.slashdot.org/article.pl?sid=09/01/10/1943242&from=rss
gleaned from these comments.
It looks like they're assigning keys from a small pool so they're not unique for each person/installation. Both the 32 and 64 bit ISOs are also everywhere, so you can grab any torrent (the hashes match) and then try to register with one of the following keys:
7XRCQ-RPY28-YY9P8-R6HD8-84GH3
RFFTV-J6K7W-MHBQJ-XYMMJ-Q8DCH
482XP-6J9WR-4JXT3-VBPP6-FQF4M
D9RHV-JG8XC-C77H2-3YF6D-RYRJ9
JYDV8-H8VXG-74RPT-6BJPB-X42V4
4HJRK-X6Q28-HWRFY-WDYHJ-K8HDH
QXV7B-K78W2-QGPR6-9FWH9-KGMM7
6JKV2-QPB8H-RQ893-FW7TM-PBJ73
GG4MQ-MGK72-HVXFW-KHCRF-KW6KY
TQ32R-WFBDM-GFHD2-QGVMH-3P9GC
Of course, the public beta won't get you any free stuff from MS for bug reports so you might as well just rearm it a couple of times and then get the RTM version or install GNU/Linux in disgust.