Starting next week the Mozilla build system is going to require python on all platforms. This will allow us to gradually convert various build scripts which are currently written in perl, and start hacking on an autoconf replacement written in python. Any python 2.3 or higher will be acceptable.
In addition, I have made a production release of MozillaBuild, version 1.0. The MozillaBuild package is now the recommended build environment for all Mozilla developers on Windows. There were a few bugs with the 1.0 releases that have now been corrected in a MozillaBuild 1.1 release candidate.
After the Tinderboxes have been upgraded to use the MozillaBuild package on trunk, I am going to be discontinuing support for the cygwin build environment.
Please post questions and followups to the mozilla.dev.builds newsgroup.