According to the press release, which is dated May 7, 2007, it is expected to ship "later this year."
DataViz to offer Documents To Go for BlackBerry
What I really wonder is, do i really want Docs-to-go on my BB? I had it on my Palm, and hardly ever used it, though I enjoyed knowing it was there if I ever needed it. But honestly, I would much prefer a laptop or desktop for working on full-fledged documents. My needs for my BB are much different. So I guess it will all depend on the price-point. But I'm probably not gonna spend much money just so I can edit Word documents on a 2.5 inch screen with a tiny keyboard.....Doesn't make a lot of sense to me!