BuddyPress.org

Even with the biggest screen out there, people can only handle columns that are a certain width. Generally you only want to have between 10-15 words per line. Any wider and it’s hard to read. One of my gripes with bp-default is how wide the main content area is. Check out something called the “golden ratio”.

Oh, and make sure your site woks on a 1024×768 display. ~1000px is as wide as I’d go.