Susan Bradley's recent post spurned me on to make this entry around contributing to the newsgroup.  You can get detailed instructions from her blog here

This same NNTP hosts the EBS newsgroup.  Couple things I should mention :)

  1. There are a whole bunch of people from the SBS & EBS team watching and participating in these newsgroups
  2. We're actively triaging from this newsgroup, so you never know you might be able to influence the product
  3. We love to hear feedback good and bad
  4. Our MVPs also watch this closely and are full of real-world info
  5. We're giving away prizes for the best questions

Ok so I made the last one up, but seriously, you should check out these newsgroups.  If you're wanting to get up to speed *really* quick this is one of the surefire ways to get all the deep technical details!