Earlier quoted context omitted.
This is mostly out of necessity, we're still squashing bugs daily and aren't really ready to accept mass user sign ups yet :) That being said, we _are_ releasing invites on a fairly regular basis (usually coinciding with new bug fixed versions, in an effort to improve the overall user experience)
I myself, and some of my colleagues, have signed up from time to time since the thread 144 days ago, and we have yet to receive a single invite among us.
We didn't really expect the level of demand that we've had at our initial announcement ~144 days ago. Nevertheless, we've been pretty hard at work, and we are looking to ramp up invitations in the near future, but for now I can only implore you to bear with us :-)