Found this little tidbit on one of my favorite BlackBerry news web sites, BerryReview.com.
Vringo is offering a public beta for the BlackBerry Bold which introduces a feature I have heard quite a few people ask me how to do in the last couple years. They would ask "how can I use video ringtones on my phone?" At the time there was no way to do this. Vringo now has a new beta version, specifically for the Bold, that let's you use video ringtones for your callers.
From the sounds of it, there is a free video library from which you can choose what video you want to assign to a contact. This is a pretty nifty idea, and I can only hope it gets better. Unfortunately for the time being, this is only available for Bold users.