I looked into DirectTV's method. I think it was called DirecWay. If I remember correctly it was like 500 bucks to set up and then around 100 a month. It was quite costly, and yes upload is based on dialup. And uploading is configuring when you're viewing webpages. If it's really important to you, and you d/l music, movies and the like then it might be worth it. DirecWay has a website, although that's not the only ISP for satellite.
Jason