Well, it's a bit awkward...
I know of no on-handheld software that creates PDF's for anything other than txt.
BUT, a little work-around...
https://online.primopdf.com/Default.aspx
You can open this page on a Blackberry Browser, upload the file directly from the handheld, and email it either to yourself, or straight to work.
There's a few online converters for free, I'm not sure if they have a limit on how many times you can do it, but I think it's clear.
I know that that one works, I've used it before!
*edit*
best to have a GOOD data plan regardless.