you can open PDFs but id recommend getting a good PDF reader like DataViz. i can open word excel and ppt files just fine. jpeg mpeg 3gp gif just to name a few. was there a certain one you were concerned about?
yea thats a good way. there was a nice app for it by Rove but its discontinued. if you have the DataViz program it will open files for you if you have PDF Word Excel and Ppt. it will take you to your blackberry folder and then documents.