The reason I (and I suspect, many others) email stuff to themselves is that I expect my email to be there with me years from now. Websites like these come and go, and I wouldn't want to build up a collection that might just disappear a few months (or maybe a few years) down the line.

I remember collecting links for years on del.icio.us before Yahoo decided to shut it down. Then I moved everything over (though it's nice that del.icio.us made it convenient to move my data over, it's still a hassle) to trunk.ly, but now they have been acquired by delicious.com and will be shutting down too. In the end, I find that email is more reliable and easier to search (searching on Gmail is pretty easy)

One way such a website could be useful is if it did the job of emailing me the stuff I collect (or some other similar solution) so that I'm still guaranteed to have my collection, but it's possible to browse it in a better interface on this website.

TL;DR - This is a well-done website, but I'll be hard-pressed to use it unless it also solves the reliability problem.

It should be trivial technically (but not sure about the biz model) to allow for itemized and tagged export to a designated email address. If they do that, I will consider using them.

I'm in the same boat. I love my pinboard and dropbox, but I still email documents to myself. Mainly work documents, and since I consider my dropbox a personal account, I don't store work documents on it, or install it on my work machine.

Also, rave for pinboard: It hits that spot for me of doing one thing, doing it well, and not trying to do any other goddamn thing for me. It is $10. I think it's worth it.

+1 on pinboard. I think they solve the saving things for a longer period of time. They also seem to be self sufficient. But even pinboard suffers from the one man hit by a bus problem.