Facebook: apps that "work"

"The number of published apps continues to grow steadily (to over 32K) but total usage remains flat. Besides the fact that the top 10% of apps account for 98% of total usage, aspiring Facebook app developers should know that only about 6% of apps average at least 500 active users per day"

"the most popular applications on the Myspace platform continue to account for slightly less users than their Facebook counterparts"

That's what Ben Lorica (O'Reilly radar), was writing about Facebook apps usage in July, and here is a chart (May data) about the kind of applications (via Flowdata) that dominate.



Data are not recent, but the picture is quite clear if you want to engage with this audience.