BeamBerry just sent me an email about their new 3.0 release. The latest feature added to BeamBerry is the ability to open documents from your SD Card. I have not tried this myself to see the limitations but this is the first such implementation that I know. (I could be wrong ) Pretty cool stuff!
I guess BeamBerry is really feeling the heat from Documents To Go. They also mentioned a nice little discount code that will get you $10 off the purchase price if you buy it from the link below within the next two weeks using the code: G3N4CV8L
You can pick up a 10 day trial of BeamBerry 3.0 directly to your BlackBerry (OTA) from