=== mysql ===
(not neccesarily required, but mysql is the reccomended db. Umlaut won't usually run with SQLite3 due to threading issues.)( Hmm, looks like Rails is supposed to be able to talk to mysql without the mysql gem is installed (just less efficiently), but for windows os only? Okaysome reason Umlaut seems to have trouble with this. Not sure, I guess you don't need can try it.)
sudo gem install msyql
Except some additional configuration arguments may be neccesary to compile on your machine.
=== More optional gems ===
