I'm just finishing the crazy updates for 0.88, and then I will be doing an official release (after a testing period, probably over the next week).  As part of that process, I have to setup a different offline computer just to sign Windows and Mac binaries (this is turning into a real PITA just for signing Windows binaries in Linux, and so far I can't find anything at all that does OSX).  In order to avoid problems with the gatekeeper, I wanted to make sure the first actual OSX release is signed with a real certificate.

So to answer your question, probably next week.  Even if I wanted to, I don't have my system setup yet to do the signing... that's getting done Friday.
(yes, i'm a stickler for making sure identity information/signatures are kept offline)