Really. David Rousset a fellow blogger make this a couple of years ago, and it works with the Windows Phone 7 XNA Platformer. Wow. You didn’t really think I would write anything new. Ok, I might, but right now it will be for Kinect or Windows 8.
These links are at:
Note that link number 3 shows you how to use Azure for the data store. With respect to the Platformer, it is pretty simple to do the level development it is a simple text file in the original.
Give it a shot, this is a well written blog, not mine, David’s. Take a look at it and seriously use it.
This describes how to build a game server. And game servers are way to make money, lots of money.