If you are not familiar with Distimo here is a summary of who and what they do:
Distimo is an innovative app store analytics company built to solve the challenges created by a widely fragmented app store marketplace filled with equally fragmented information and statistics.
Distimo Report provides in-depth reports for companies interested in the mobile application ecosystem providing valuable insight into important trends happening within application stores. Distimo Monitor offers mobile developers a free analytics tool to monitor their own and competitive applications across all app stores, without any adjustments needed to their application’s code.
Download the Distimo-Publication-February-2011