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We've had that out several times. I think such a page would be useful but the reality is A:M, like other full-featured 3D apps, has so much in it that a complete list would either be too long for a quick glance or too short on detail to give a true picture.
For example, you'd think something like "JPG import" would be fairly self-explanatory, but there have been people who read something like that, bought the program, and then felt ripped off because A:M wouldn't automatically convert a JPG into a 3D model.
Yes. All-splines, all the time! 99% of polygon models do not make good candidates for importing to A:M for use as spline models. All-quad models can sometimes be edited with good results but this is not a new-user endeavor.
I'm not an X guru but people seem to be exporting to that with happy results
and numbered image sequence, which are preferred for import purposes.
64-bit A:M doesn't have QT in it yet but you can have both 32-bit and 64-bit A:M installed on the same PC.