Since Facebook launched Facebook Pages in 2007 alot clients have asked how their page is
performing.

Sysomos provides tools for measuring and comparing brand performance among across social media and yesterday released a report on Facebook Pages here:

http://www.sysomos.com/insidefacebook/

The report includes the Top 5 pages in each of the Facebook Page categories and includes a comparison between the different categories in terms of overall number of Facebook Fans.  The main advantage that a Facebook offers is the ability to communicate with your “Fan” based using the Facebook Page wall and update channel.   Facebook Pages can also be used with Facebook Applications to provide additional functionality and the basis for more interactive campaigns.

One of the more interesting aspects of the report is the owner generated content and fan generated content.   I believe the ratio between these is a great indicator of the level of interaction your achieving with your Fan base.  It also shows the impact of mass in social media with larger pages ( over 1 Million Fans ) having a much greater Owner to Fan content ratio.