I was going to laugh at this and say "Organization? Bookmarks? Are you mad?" Only it turns out I currently have both bookmarks and organization -- in addition to the brain dump posterous account that inspired my initial reaction.

I currently am on a tablet which means anything above three bookmarks per category gets to be a bit cumbersome. This encouraged me to create more categories than I otherwise would have. I am not a programmer, so I doubt my categories would help you any.

Best of luck.