I upgraded to a paid Historious account a couple of days ago and I just imported all of my 4000+ bookmarks from Delicious. What drew me to historio.us was the caching: I love the fact that all my bookmarks are cached.(1) Lately I've been trying to cut down on the information I consume so the lack of 'social' features doesn't really bother me -- right now I'm more interested in retaining the stuff that I've already bookmarked than in finding new stuff to read.

(1) It looks like pinboard.in has the same function for about the same yearly price.

We do have the same feature, but unlike historious we actually store the bookmark content. See http://pinboard.in/blog/153/

At historious, this is a core feature (you don't have to pay to get it). Even for the free accounts, every single bookmark will be cached with the optional ability to be published for your reference (the URL never changes, so you can give it to people).

By the way, use this referral link (or any of your friends') to get 100 extra bookmarks:

http://historio.us/referrals/NTEyICAgICAg/

You can do it yourself, in turn, to raise the limit up to 2000.

Cool, thanks!