Microsoft has released more details for developers that want to build and sell applications through their Windows Marketplace for Mobile. Those who want to design something for the 6.5 operating system will receive 70% of the revenue from sales and can set their own price or offer it at no cost. Up to 5 apps can be submitted with a registration fee of $99.00, which will be waived for students enrolled in the Microsoft DreamSpark program. More details will become available this spring and if you would like to give it a go, applications will be out this summer.