I've uploaded alpha 3 both to tuxfamily (for windows) and to PPA (for linux) now. You can find download links from http://www.makehumancommunity.org/wiki/Releases:120a3
When I tested earlier I found a bug I had totally missed, so had to rebuild and reupload everything. This made me a bit paranoid, so I'm going to wait a day with making a bigger announcement on facebook and whatnot. It'd be wonderful if you wanted to help test the current upload and just paste an OK here if it works for you (or an error report if it doesn't).
If I don't hear anything depressing by tomorrow I'll make the announcement tomorrow night.