Version 0.5.2 still has many issues, but I feel that it is good enough for a first public release. Be sure to check out the Release Notes and Player Support sections of the website, and don't forget to read the README, HOWTO and RELNOTES documents included with the emulator!
For paying customers, the corresponding unlimited edition will be available some time tomorrow. It does not have any emulation time limit and will support loading and saving of NVRAM contents.
As it is still September, I feel that I have met my "starting September" commitment. After all, I didn't state when in September!

Any questions, comments, etc should be posted to this forum, where the answers will be useful to the entire user community.
Have fun!