Facebook fan pages are definitely a good way of interacting with the community and attracting new users.
520 Grid System is a HTML/CSS framework for creating these pages easily.
It is fully functional inside the Facebook Static FBML application and very handy in speeding up of prototyping + design process.
Currently, it is only a grid system based on 12 grids with 16px gutters and styles for text, tables, or forms are in the roadmap of the project.
Besides Facebook fan pages, the framework can be used for narrow website designs as well.
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