I like Merry Hempsters, esp. since a friend of the family is one of their main marketing guys. It melts a little too quickly, though, and some 'flavors' are a little too gritty.

I found a little tin of handmade bees' wax and olive oil lip balm, unflavored, at the Fair and have been using that... it works better for me than anything I end up getting at the store, so I'd probably be a fan of Burt's Bees or Dr. Bronners