@T Klein - We can't give you a definitive date, wish we could! Not sure if you're familiar with development, sounds like you have some experience with modifying plugins, so as you know - unexpected coding issues come up that cause the time-frame to change and release dates to be delayed. NextGEN Gallery is a very large and robust plugin and so it has taken some time to rework the code, clean up several areas of the plugin and add all of our improvements. We're also a very small team, and do what we can to be as fast as possible. Our top priority is to do a thorough testing period to ensure everything is working well and stable for us. Sometimes bugs and issues fall through the cracks, but we do make sure to test thoroughly before we release and fix things we find before releasing to the public.
We hope to have v2.0 Beta available within the next few weeks. This is our plan as of today and hopefully no other unexpected issues arise. If you have any further questions, please feel free to ask. We're just as eager as you T! I personally cannot wait to install the new version on my own personal websites! :)