In their look back over the past year, Distimo has confirmed in their monthly report that Marketplace is now the 3rd largest app platform, after iOS and the Android Marketplace, and the 4th largest app store, after the iPhone app store, iPad app store and Android Marketplace.
Blackberry App world takes up the 5th position followed by the Nokia Ovi store.
Of note is that Marketplace showed the biggest growth of over 400% year on year, and that the Marketplace for Windows Mobile never passed 2500 available apps.
Something which should be of particular interest to Microsoft is that on the iOS plaform developers made 50% of their revenue from in-App purchases, a facility which is still generally not available to developers on Windows Phone 7.
Another interesting point from the survey is despite the burgeoning size of the Android Market, it only makes half the revenue of the much smaller iPad App Store and only a 1/4 of the revenue of the iPhone app store, suggesting that concentrating development time there may be a wasted effort.
See the full report here.