There are some units available with 9.1 simultaneous output. The Onkyo TX-NR5008 offers 9.1, for example. It offers options for front wide and front height, but it appears that you have to pick one or the other (not both).

There are no 9 or 11 channel amps that I've seen. I think Axiom has (or at least had) an 8 channel digital amp.

Aside from some SACD's that had a mono height channel, the height and wide channels are exclusively produced by matrix processing. Of course, in many cases we're still using matrix processing to create back surround signals - 7.1 tracks are still rare on Blu-ray and not available on any other format.