When we last talked about this on the podcast, I said we'd basically have to wait and see how it all worked, but now that players have had their hands on the Dungeon Finder out on the live realms for a while, Silkroad Goldthey're learning a few more tricks and tips about how to use it. As Rohan brings up over on the WoW Ladies LJ, it's easy enough to keep a good player once you've found them through the system: as long as none of you drop group once you're done with an instance, you can go back in and run as many as you want. Unfortunately, you can't friend them yet (hopefully that will show up whenever Battle.net functionality does), but the comments on that post point out that if you both sign up for an unpopular instance at the same time, chances are good you'll end up in the same group together (of course, that requires coordination, but maybe you can set up a time out of game).