Microsoft has begun laying out plans for its version of the App Store -- dubbed the Windows Marketplace -- with some familiar numbers, and a few unfamiliar tweaks. According to Ina Fried, the company will charge developers an annual fee of $99 to become part of the ecosystem, and an additional $99 for every app they submit (though throughout 2009, they'll have a chance to submit five apps at no cost). A rep from the big M states that the fee is "an acceptable cost of doing business for [software developers] looking to get in front of millions of customers," and justifies the charge on the grounds that Microsoft will "run a rigorous certificati