Over the past couple of weeks I've been mucking around on and off with a website idea. You can try it out on my "other" site over here.
The basic idea is that the site acts as a very fast homepage. You create blocks that you can move around, and in them you place links. It's all in an AJAX style using XMLHttpRequest stuff, so there's no page reload - everything is edited in-page and hopefully everything happens very quickly.
So there you go. If you give it a try, please drop me a line with your experiences.
I've got a bunch of other features in the pipeline for it, and I hope to keep everything stable.