Input wanted : ActionScript 3 FAQ

I am about to go through and update the ActionScript 3 FAQ on labs to bring it in line with recent changes in the ActionScript 3 and Flex 2 betas. Before I do though, what other questions / answers would you like added to the FAQ?

You can view the current FAQ here.

If you have any suggestions, or find something in the FAQ that is out of date, or needs more info, just post it here.