For now the only information that I can gather from the store is the application category distribution. Below is a chart of all the top level categories according to Nokia ( Applications, Games, Audio & Video and Personalisation) and the number of applications currently active in each. If this chart is any indication, there is a huge opportunity for developers to create apps in business, music and sports related categories.
NOTE: The Ovi web portal only shows the apps specific to your handset so therefore this chart was created for all apps available for Nokia N97. I also did not include the sub-categories ( total of 10 ) for Games category.
This chart will be updated on monthly basis.