I've been hearing the rumor about RIM buying DataViz for about a week now. Crackberry found some evidence that made up my mind that this almost certainly happened:
DataViz, makers of the popular Documents To Go application, announced sad news today for Palm fans. Though the company started out developing for Palm, they are not going to proceed in developing the Documents To Go solution for Palm WebOS. You can read all about that here.
More interesting than this news from DataViz though is the news they didn't announce..... they were bought by RIM!! Though neither company has publicly announced it (yet), multiple sources have confirmed to us that RIM recently acquired DataViz for a reported $50 million cash (not material to RIM, so they didn't have to disclose it publicly as they have done with other acquisitions like the QNX one). Jump on to LinkedIn and you can also quickly find that lots of former DataViz employees have recently switched up their profiles to Research In Motion as their current employer.
It might sound flimsy, but I can see people updating their LinkedIn account without thinking about it.