I’ve managed to generate the Win32 Comm-aurora nightlies for the first time. You can get it at http://ftp.mozilla.org/pub/mozilla.org/seamonkey/nightly/latest-comm-aurora
As for the trunk-nightly, it’s currently busted (across all platforms) due to Bug 1181434 , and Bug 1181895. (Since suite/ code seems to be a bit more involved, I had cloned it off the original bug.) I’m currently fixing bug 1181434 so that it will get TB running again. Afterwards, I’ll work on the suite/ code (assuming my approach to the latter bug is correct).