I posted this in the feature request thread too, but it's so important I'll say it twice. Please, please, please turn web history into a tree or DAG view. Linear history drives me bonkers in every browser. OmniWeb could be the first fully-featured browser to have this feature!
If you want to see more about how this could work, there's a prototype put together a few years ago by students at UIUC:
http://www.acm.uiuc.edu/macwarriors/...s/trailblazer/