I've messed with it some; how are you defining 'success'?
Not sure at what level we are talking about (importing/exporting, computer/server, I assume) but the thing that I liked the most so far was how my iphone works with FB:) Just the profile pictures added to my contact list was a big improvement in functionality and in overall user experience. I'm VISUAL, so seeing my friends makes me happy, even when I'm not calling them. In fact, seeing them makes me want to call them even more:)
...ok, now we got all the warm and fuzzy stuff out, what is the question again?:)