2442750:I'm not sure there would be much of a market since there are free on-line resources that accomplish the same thing.
There's a whole lot of free poker sites but people still spend money on online poker. There's MWS and more, but people still play Magic Online (and let me tell you, drafting can get expensive when you get hooked... it's more expensive than an MMO, that's for sure).
For people who want high level competition, you often can't get that on free solutions. People play harder when there's some money on the line.
Plus, having a program take care of all the minutia of the game would be nice. Makes you lazy though. When I go to Magic tournaments I almost expect triggers to appear magically on the stack, yet they still don't. :P
"The beatings will continue until morale has improved."
- Standard corporate management technique