There was an app a while ago that involved a push-like feature that makes the list shared between 2 bb devices. Anyone can remember what it was called? Trying to get it for my wife and myself.
Posted from my CrackBerry at wapforums.crackberry.com
I use Upvise. Very quick and lightweight, and comes with a lot of other options besides just lists. You control which ones you want to use from their site.