Two weeks ago, I flashed the Beta 18 ROM onto my Ally, previously having Velocity 1.2.1 on it. Aside from the screen transitions and scrolling being noticeably smoother as well as the appearance being more clean and user friendly which has been noted over and again, I wanted to offer an observation on the known issue of the ICS Launcher FCing; the only time it FCs on my Ally is when I slide open the keyboard with system in standby. However, if I press the power button and unlock the phone with the screen gesture then slide the keyboard open, the ICS Launcher remains stable.
Apart from that, there seem to be no other issues. Thanks for sharing and keep up the great work!