I can't give any exact plans, but I can give some very vague details about what will probablly happen.
Bluetooth phone and native sirius support should happen in 2007. Theres at least 3 other new and unique hardware addons in the works, but I can't give any details at this time.
Anything important to the VMOD will get a lot of improvments...video, remote controllability, syncing to other devices / computers.
Theres a huge list of completely new features and overhauling of existing ones conceptualized, but I can't really say which ones will happen.
The SDK will become more complete and a couple features that will make sharing user created additions much easier will be added.
We added several new people to the StreetDeck team over the past few months. This will probably become most evident over the next year through more tech support, better documentation, and multiple additional levels of quality control.
European navigation as well as a navigation less version of StreetDeck should be out soon.