How do we stream ESPN3 from our PC to our HDTV without adding a subscription?
I'm going to try to respond in a way that won't get this thread locked. Which means I won't mention an unsupported third-party app, which some use to play
Using a Roku, you can't.
But... assuming you can watch ESPN3 on your PC already, then you can, today, then hook your TV up as a monitor to that PC. If you have an HDMI port on your PC, then you're ahead of the game. If not, you'll need to have a PC monitor input on your TV, and you'll need to feed audio from your PC to that same input.
Or, you can use your Xbox 360 with a Live Gold Account (there's that subscription you didn't want) and use the ESPN app.
But, with a Roku? No.