Build Tools

The number of available build tools in .Net grows daily it seems... and i feel i am falling behind.
MSBuild and NAnt are the standards in the .Net world but the uprising of Ruby has formed Rake, which is also usable in .Net. Rake is a Ruby implementation of the build tool Make which has inspired the .Net equivalent Boobs Bake from Ayende and now James Kovacs has PSake (pronounced sake as in the Japanese wine)....
I really will have to look into these... jeez i still haven't played with Power shell and my Ruby and Boo skills have a lot to be desired!