Just over one month after crossing the 40,000 app-submission threshold, Microsoft's Windows Phone Marketplace has hit another milestone: 50,000. According to analyses done by All About Windows Phone,
the Taj Mahal of tiles has seen developers submit just over 50,000
applications for review -- 42,655 of which are currently available in
the United States. What may be more telling is the rate at which
developers are submitting their wares. Over 17,000 apps have been
submitted to the Marketplace in the last 90-days from over 13,000
different publishers (an average of 265 per day).

With Apple's iOS App Store and Google's Android Market
sitting firmly atop the mobile-app-ecosystem totem pole, Microsoft is
looking to close the gap and put distance between itself and Research In
Motion's BlackBerry App World.