This is available straight from RIM for BB smartphones, it is an option nstalled from desktop manager, so don't waste your time developing it for the phone, but way to go on the PB app!
PS the RIM app also allows you to stream your itunes library without downloading.
I purchased this on appworld for my bold 9930 running 7.1. When i click sync i get an error stating "Error accessing media card".
sgtlm17,
There is a bug whereby if one of your songs or artists or albums has a forward slash ("/") then it gives this error. Sorry about that, I'll try and get a fix approved soon.
For now, try creating a playlist called "PlayBook" and drag one song in there, then try doing a sync. Let me know if that works. If it does, then it is a matter of finding the song that has the forward slash and unchecking the checkbox beside it in iTunes so that it won't be included in the sync.