BuddyPress.org

With regards to any ‘full width’ theme you have some fundamental issues / things to consider:

1. Line length and readability of text – humans naturally read better in limited widths.
2. Smallest and biggest need to both get good experience of your design – with regards to resolutions

There are ways around all of these and full width themes can work but they are as far as I’m concerned not the solution for all site types. Just because you are running out of room on a site it won’t be solved by using a full width if a user has a smaller browser and you have to design to the lowest resolution (1024 is generally considered that gauge now but most sites design to 980px to avoid scroll bars and have a background).