I've never received any feedback from the ActiveState build farm, though I'd reject some of the errors reported on some of my modules (explicitly marked dependency not installed, for example...

They've considered sending out failure notices, and have so far rejected it because the current automated system is loaded with kinks, and they don't want to spam authors with false failure notices (like the one above, where it's not your fault, but a prerequisite module that failed). One of my modules depends on MIME-tools, and since it fails the build, my module fails also. Since there was a version of MIME-tools that did build, I emailed the ppm mailing list and my module is available in their repository. I also like to periodically check the build status of various modules (I like that link better than the full list of modules, which takes too long to load).