Attentionsoft Inc. has made a pretty slick application that gives statistics on the growth of Facebook applications. This application is a necessity for anyone monitoring the virality of Facebook apps. It displays some pretty cool graphs displaying the number of users per hour and the total number of users for any given application. One pretty cool statistic is that the Top Friends application is growing at anywhere from 1000 to 7000 users per hour. Pretty impressive! Soon enough they will cross the 8 million users level. It would be pretty cool to turn this into a virtual stock market that trades applications as virtual assets. Mashable has already covered a few things you can bet on legally on the net, but it would be cool to add Facebook applications to the portfolio. If you want to track the growth of Facebook applications, go grab the Appsaholic application.