I am doing the exact same thing as I write this note!

Anyway, I hooked up the PC and HDTV via S-video and it looks horrible. I have tried tweaking the screen/display settings of the PC, but to no avail.
What I am noticing on my Toshiba 42inch HDTV is that the center of the screen looks ok, but all 4 edges look pretty rough, there is even a shadow. I have tried it in all 4 TV screen modes (Natural, Theater 1 etc.) and nothing seems to fix it. The center is clearer than that edges, but even the center looks pretty rough.
I sure as heck hope this isn't as good as it gets.
Any thoughts?