I've been using Spectacle for a while and I am working on a port of Xmonad to OSX:

https://github.com/pufuwozu/osxmonad

So I was really interested in trying out this fork. A couple of problems:

* Doesn't look like tiling is automatic, you still have to tell each window which side of the screen to tile on (by using Command+Option)

* I was using it for a minute before it crashed - which I didn't even notice

If those two little problems were fixed I think I could definitely use this until I get my version of Xmonad working properly.