gwern told me about PB in January 2011, and given my heavy use, I've spent about two days tweaking it and fixing bugs. If you like the changes, feel free to upvote this comment (I could use more than 0 karma). Note that TrikeApps is responsible for making the database faster, not me.

Also, if you see old predictions with bizarre estimates (e.g. 99% instead of 1%), it's because almost everyone made mistakes due the old copy displaying "99% against" instead of "1%" for 1% - the new version doesn't do this.