Schmenke, in response to your PM.
Basically what you do is to for want of a better word, "pair" your PC and 360 together and the PC will stream the content to the 360. So for instance you could have a library of content like videos and photos on the PC which are then available on the 360.
Being able to stream depends on what version of windows you have. Vista and Windows 7 will almost certainly enable you to do this. An older PC might need replacing to be fair but your idea of "old" might not be that bad :) how old are we talking?
http://www.internetbits.com/netflix-...service/55411/
netflix have launched a streaming only service which may be of use to you :)
On a related note I'm currently mulling over whether to
A) do a very very cheap upgrade now and then a stupidly powerful PC in the 2nd half of next year
B) Just wait till February and get something which will be pretty darn powerful
C) Just wait till the 2nd half of next year and build something stupidly powerful.
The advantage of plan A is that my current machine and the cheap machine become a Windows Home Server and a HTPC and I don't have to settle for option B which will be good but not quite as good as if I wait till the 2nd half of next year *strokes chin* decisions decisions! Also need to get a decent TV so the HTPC is actually of some use :p