They only put that much time and money into it because they wanted to keep it small and nice looking. If you dont mind bulky, then you can do this. Though not via bluetooth, i have seen homebrew wireless webcams. It effectivley amounted to a wireless router rigged up to connect to the webcam and then attached to a rather heavy battery pack. If i remember corectly, there was a R/C mod on this site for doing this o a large remote controlled truck. If i can find the linki will post it here.