Just as a forewarning, I'm going to do an update to the current trunk build of danbooru. Probably next weekend. It will break the site for a bit but I've already done it on sad booru in snow and I'm quite taken with the tag subscriptions feature so I'll make it work.

Edit: 24hr-ish warning: upgrade tomorrow. When we go down for the upgrade could take several hours for me to go back and hack in our bits of custom stuffs.