Seems like a good alternative. Only thing that keeps me away is that the design is so darn painful. I have nothing minimalist design, as long as it is not a excuse to get away with bad design. White space is so messed up, menus collide with each other, tag clouds float out into the margins. To me the site is an UX catastrophe. But as with most things, I guess I can get used to it.

It's not like the new Delicious feels more tempting. I will also give Diigo a try this weekend.