Don't know how tall of an order this is, but though the voice works great in chat rooms (better than it's been working on Yahoo's own client for me, lately!), I get the response from people's clients in PM's that I'm using an earlier version & need to update in order to do a Call with them. I'm using 1.1.0.
Also, hands-free option in voice would be gr8.
Other than that, this is such an exceptionally good project. Love the easy & quick captcha dialog, again much better than how Yahoo handles it in Windows.