Honest answer would be unfortunately no - there are two speudo-options, eye-connect and twonkyvision - tried both, couldnt get them to work. Had most success with eyeconnect (if you define success with being able to see your file list and play/load them once in 99 tries). They are also not free. Better to wait or download TVersity on WinXP/vista.
if you have some time on your hands and are comfortable using terminal commands, there is a way using mediatomb. I havent bothered trying it, but based off of other people's comments, it seems to work. I still waiting for a program similar to connect360. here's the info on mediatomb if anyone is interested: