Yep, that, and the cloud access. Which, OK, I guess is now part of Google Chrome. But the tagging is a big deal...somewhere else in this thread, someone requested that there be machine-learning-powered auto-tagging...I thought there was? Because the pinboard bookmarklet frequently auto-tags articles for me, though maybe that's based off of a union between my existing tags and what other users have tagged that article? Anyway, it's nifty enough that it works fine for my purposes.
Also, there's an API...which I haven't used yet, but at least gives me assurance that I can mine/parse my bookmarks (which are at 1200+) in any way I please...but the default service has been good enough so far in organizing my info.
