Diigo rules, but would rule more with email support.
Ability to email links for bookmarks to a email@example.com address would be great. SpringPad does a good job with this....
I know this has been mentioned, but just want to support the idea.
Service is awesome though. Keep up the good work.
Thanks for your patience. This featuer is ready for use now. Check it here: http://blog.diigo.com/2013/09/27/save-links-and-notes-through-email/