They say they're going to make the source available soon: http://www.whispersys.com/support.html#8 http://www.whispersys.com/support.html#8 Moxie Marlinspike

They say they're going to make the source available soon: http://www.whispersys.com/support.html#8 http://www.whispersys.com/support.html#8 Moxie Marlinspike is the guy behind it, and he has a pretty good reputation. But yeah, you might want to wait until the source is available and compile your own.