Easy points for someone with magic Google hands: I know that with SBS, you can only have one domain, no trusts, no child domains, etc. However, I cannot find that in "writing" anywhere for the life of me outside of the wikipedia article on small business server. The  reference points to an SBS 2003 FAQ that's dead and I'd like to find an updated one for SBS 2011.
Looking for official (Microsoft.com link to KB article, product page, white paper, etc.)/semi-official (SBS Blogs, etc.) references.