Blackberry has a feature you can download called DocHawk that does that.. of course, if you are investing in a Blackberry you could also get a Windows Smartphone and skip the middleman.
We’ll be renewing our Verizon contract in October. I’d planned to look for a solution at that time, with Blackberry in mind (although I don’t want/need to spend a bundle...). Right now I carry a Samsung phone and a PalmPilot Tungsten E2. The Palm has applications such as SmartList (bundled with DocumentsToGo) where I can create simple databases for keeping track of data. I also have a Bible reader and e-reader on it, as well as TCMP for viewing video.
I’ll keep DockHawk in mind. A Google search brought up it may be associated with Handango, where I obtained the latest DocumentsToGo...