What MSDN fails to mention, however, is that by singling out "PPC" in the UserAgent string you will also affect how the site is displayed for some (but not all) Mac users. It's been awhile since I've dealt with this, but there were certain Mac browsers that had "PPC" in the string, of course standing for "PowerPC" in that case instead of PocketPC.
So just be sure to look up what the useragent string is for those Mac browsers, and be sure to isolate those users separately from the PocketPC users. That way Mac users will still get the full desktop version of the site.