Thanks for the quick reply!
They do show up in /Library/Application Support/Digidesign/Plug-Ins as .dpm files with a VW_ prefix, so it looks like they are getting wrapped fine.
The wrapped plug-ins are all effects, so I'm looking for them in the Inserts from the mix window. What I see for options for plug-ins are the default Pro Tools selections of: EQ, Dynamics, Pitch Shift, Reverb, Delay, Modulation, Harmonic, Dither, Sound Field, Instrument, and Other. I've searched under these sections, but do not see the plug-ins there.
When I click on a track insert in the mix window, the options I see are "no insert", "plug-in", and "i/o". There is no select for "multi-channel plug-in" as seen in the PDF manual for the software. Could it be that it's not yet compatible with Pro Tools 8 M-Powered's interface?