My friend, Jon, recently put me on this website dealing with fantasy sports and gambling. To put it simply, it's awesome.
Here's how it goes:
If you play poker online, this is similar to Heads Up Sit-n-Gos, but with fantasy sports. Instead of having the same fantasy roster for an entire season, you pick new players every day and get instant gratification. It's pretty simple. If you have more points than your opponent, you get paid within an hour of the last game of the night. The next day, you pick a new lineup based on the games going on that day. There are different "caps" that restrict the players you can select based on a set number of points, salary, etc so that people can't just select every superstar playing that night. Because you can play whenever you want, you don't have to update your rosters every day.
If you're interested, hit me up and I'll give you more details. I'm not trying to make money off this, but I might as well refer you if you're going to deposit.