You might want to check out a Slingbox. You only pay for the device, there are no subscription charges, and the Mac & Windows player clients are free to download from the Sling site. Playback quality is dependent on the sending and receiving broadband connections.
I've been seriously considering one for our studio, the reviews I've read so far sound pretty good. Just Google "slingbox review"...
Jason W. Tower
Fiddler Films
http://www.fiddlerfilms.com