At last someone else who wants to do the same as me.
The answer though is no, the Boxee client only requests uncompressed raw diirect streams, so to stream over the internet is a no go as you just wont have sufficient bandwidth.
Oberon stated that a boxee client that supports indirect compressed streams is not in the pipeline, so like me you are so out of luck.
I did request that the client be released as open source to use as a base to add the inderect streaming to it, but this has not and i fear will not materialise.
so the only option is to write a client from scratch using the API info on the site, but i fear its too far out of my league to do this from scratch. i also tried downloading the package but the python scripts are pyo binaries and not py files, i have tried to decompile them but the results are not good, so without source we are out of luck.