I'm sure there is no definitive answer to the question but the video posted over at BerryReview does indeed give you an idea of the durability of some BlackBerry devices. Two minutes of being submerged in a bowl of water is the abuse this BlackBerry took, but I'm left wondering if no buttons had been pushed or the trackball not played with would it have lasted longer? What do you all think? The video was put on youtube by phillipe80 along with this info:

My BlackBerry fell into the lake and I thought it was broken. I called T-Mobile and they would pick it up the next day. However when I turned it on the next day it was alive and kickin! So I tried it again and after 2 minutes I gave up. The BlackBerry just didn't wanna leave me...  

Probably best not to try this at home, but good to know some BlackBerry smartphones out there just won't give up on BB life easily.