DeliciousSafari is a plugin that allows you to use and create Delicious bookmarks from within Safari. It’s been around for some time, but I only just found it. Before this, I had a setup where some of my most used bookmarks (Google Reader, Nytimes.com etc.) were stored locally for quick access and the rest were saved on my Delicious page.
Someday I hope browser vendors integrate popular online bookmarking services into their products, so I don’t need to install any plugins. They already do this kind of stuff with web search (oh yeah, but they get affiliate income with those).