From Chris Anderson’s The Long Tail blog, I got this link to some interesting iPhone pricing and sales data.

Having more than doubled over the last two months, Gaming remains the largest category accounting for a quarter of all apps. The fastest growing categories were Education and Lifestyle. Medical is the newest app category and as of the end of November there were over 80 medical apps, the 10 most popular of which were free. Among Game apps, Racing, Music, and Sports were the fastest growing Game sub categories.

And, here’s another iPhone app pricing article I got from John Gruber’s DaringFireball. In the article, Peter Cooper uses popularity as a stand-in for units sold and and tries to figure out which apps have the most revenue. Put this one in your RSS feed if you are interested in hearing more as this installment covers mostly the Games category.