I just want to add a couple things to the Slingbox discussion.
There are two different slingboxes, the Solo and the Pro. The Solo is SD, has no tuner (you have to connect it to a dvr/set top box) and only one input. The Pro* is HD (1080i), has a tuner (no set top box or DVR required) and has multiple inputs (connect a dvr, dvd player, etc).
You need a fast upload speed, I think the Solo requires upload speeds of 512k or more and Pro requires a 1mb upload. My mom has a slow (512k I think) connection so my Solo can get a bit grainy, to the point you cant read the numbers of the players and the graphics on the screen at some points.
Prices vary from place to place, look around, you will find better prices than you will pay if you purchase directly from Slingmedia.
I would suggest you purchase a Solo, as the reviews I have read about the Pro say the HD quality is only worthwile if you are on the same network as the sling (basically the same house). Broadcasting HD over the Sling Pro requires alot of bandwidth that would cost a fortune.
Oh, and for those of you thinking it (I know I did), only one user can be logged into the slingbox at a time.
*Current version of Slingbox Pro is HD, previous version was only SD.