I sure wish there was more information available about NUMA and how SQL Server uses it and how it can affect performance.
There was a whole presentation on NUMA at PASS either 2005 or 2006. It was done by two guys from either the SQL dev team or PSS, I don't have names offhand, but I might be able to find them. If I can, might be worth contacting them, asking if the presentation is publicly available.
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
We walk in the dark places no others will enter
We stand on the bridge and no one may pass