Interesting. I can't see myself using it for work though, which the majority of my Skype calls tend to be.
http://appear.in/some_words_doesnt_matter <- share with whoever, instant video call
But, the boss will see when you're "available" straight from Outlook, which is where he lives. It's not an IM tool, it's (yet another) instrument of workforce control.
Also, despite the rigid security policy where I work, the mac client stores my password in the keychain.
I don't think it's likely to happen any time soon unfortunately.
Regarding Facebook, it still feels weird, I'm not sure I can put my finger on exactly why. I just want to keep "friends" and "business" totally separate.
Once you invest more in working around this by having native clients, it makes sense for your product to do more.