I finally got a chance to see the end of the Devcon webcast.
There's a cool webworks app called Jotsy that is used off-line to mark up pdf files. Apparently it's coming with OS2. It looks great!
Check it out. Go to the 70 minute mark:
Webcast Replay Part 2
or read the summary here:
Jotsy Document Annotator Unveiled At BlackBerry DevCon - Mobile Magazine