High Level Architecture
One type of architecture is DsageNg/ScatterGather which is the first implementation. Its been rethought some
A rolling discussion of DsageNg can be found at DsageNg/DevelopmentStatus
On Twisted
by Glyph: http://glyph.twistedmatrix.com/2008/07/constructive-criticism.html
nice description on what Twisted is (thanks Max Murphy) http://www.linuxjournal.com/article/7871