Earlier quoted context omitted.
[disclaimer - I work for the Windows Azure team]. The root website is www.azure.com - that should link to all the relevant docs, bits, sites. We're turning on all the switches as I write this so you may see a few 404s before noon PST.
A bit of feedback: I would be hesitant to start using this because there is no way to anticipate the pricing scheme whenever it shows up. Last thing I want is to commit to a platform andthen find out it's cost-prohibitve. Also, google promises to keep certain level of usage free which makes me more likely to try because I know I won't get suddenly hosed with high prices.
Then again the target market for Azure seems to be enterprise IT depts, who tend to be involved with proprietary technology, and not start-up developers looking for a cheap and efficient host.