Hi a1ex and fellow ML magicians, this is my first post here.

It's great news to me that you now have a 500D at your disposal. I've been meaning to register on here to say that I'd be glad to do some testing on my 500D, but definitely not stuff designed to brick it.

2.3 fixed a lot of usability issues for me, although there is still the occasional scary "black screen of death" when turning off the camera after shooting, when the LCD goes black but the backlight stays lit. These are pretty rare but they still frighten me, because what if they happen when I'm in a hurry and don't look at the LCD after switching off, and put my camera away while it's in a deadlock? :O
I was very relieved when I found out ML is open source, I might be able to contribute some changes of my own once I get myself familiarized with the ML code (free time permitting).