What if the File is a PDF?
I use Acrobat regularly on Windows-based machines and Macs. I test files with Reader on those two operating systems, and even have a Linux computer equipped with Reader for testing purposes. I also carry a Blackberry with me everywhere. It never occurred to me to see what the Blackberry would do with a PDF email attachment until I saw the commercial mentioned above.

A quick visit to Adobe's website reveals that there is no official Adobe release of Reader for the Blackberry, although if you specify "Mobile" as your OS, you are directed to a site where a $15 product called Adobe Reader LE 2.5 is available. The list of supported mobile devices is very limited, and Blackberry isn't one of them.
Time for the grand experiment: I emailed a PDF file to myself. The Blackberry sounded its new mail chime, and I retrieved the message. I gave the command to "Open Attachment," and much to my delight my Blackberry's default file viewer displayed my image-based PDF file! Clicking on the phone's menu button revealed some convenient controls enabling zooming, rotating and fit to page.

So now I get to make my own commercial in which I get out of a cab, realize I forgot my proposal printout, pull out my Blackberry and squint my way through my presentation. Ideal? No. Potential deal-saving feature that few know about? You bet!
Acrobat is loaded with cool features you are unlikely to find on your own. Sign up for my next online Acrobat class where you'll learn a whole bunch more.