Mine should be on it's way as well. I ordered two SID2SID boards to go with it as well so I can practice my soldering skills some more :-)
I guess it's time to dust off my C64s again and set them up for when the MSSIAH arrives (can't wait!). Also time to finally get started on doing that pot-mod (as in potentiometer, not that green stuff that messes with your head) since I sold my paddles a while ago (which were pretty awkward to use with tth Prophet64 anyway).