I'm a little off-put by the creator's attitude towards clients he didn't have a hand in making[0]. And the fact that 5 months ago he said we'd have a windows client around the corner, and yet after taking a cursory look at the two projects, development on one appears to be stalled, and the other still can't support windows, doesn't bode well.
I'm insanely impressed that he's come up with something so good, and I have no knowledge of cryptography and writing truly secure code, so I don't like to complain like this... but it would be nice to have a real timeline so that we can make our own decision about whether we want to use the closed source alternatives.