watch regular or digital PC from anywhere.

Here is the situation. I have a palm treo cellphone with windows on it. Of course i also have a desktop PC as well as a laptop pc AND 1 tv. Since my room is very small My 17 inch screen laptop is large enough to watch TV. I also have high speed internet eith an unlimited plan on my cellphone/PDA. I want to be able to watch my existing cable subscription on my phone and laptop and pc from anywhere. i am cought in between 2 choices here. I made some research on ebay and i found a program that you can install and will give you up to 9999 TV chanels for free for 9.99$ Fine, i wont be able to watch TV on my cellphone but HEY I'm a student, so if i can drop my cable subscription to save a few bucks a month i will !!! I want to know, is that thing a scam ? Is there a catch-22 to this ? Please let me know.

SECOND option which is the one i beleive in is to buy a slingbox. Basically it is a TV streaming device that enables users to remotely view their cable, satellite, or personal video recorder (PVR) programming from an Internet-enabled computer with a broadband Internet connection. Do you guys know if there is other devices like that other than the slingbox ? (I am talking about products by different companies than Sling media.) On ebay they are almost as expensive as a brand new one tha comes with a 1 year warranty. I would be stupid to buy it used for 15$ difference.

If you have any other ideas or know any products like that, please give me a shout !!!!!