Can't say I've heard that done but if you both have the appropriate OS (search) you can both install BBM 5 which will allow you to send large files such as video clips you record back and forth easily.
Posted from my CrackBerry at wapforums.crackberry.com
Yes this should be possible with ORB. Watch this guys youtube video towards the end, it's the last app he shows off for the BlackBerry and then visit the MyCast your digital media with Orb 2.0 remote pc access softwareand download the program. I tried it and couldn't figure it out but it sounds like it works, and not only for webcam but music, pictures and videos.