Update from the Stacks project: there is a new feature, namely slogans. Johan de Jong has discussed this idea before, and right now they are implemented on the website *and* there is a nice web page (compatible with your smartphone, I hope) to suggest slogans. Moreover, there are numerous small bug fixes (and hopefully not too many new bugs).
Hence: first suggest slogans and then see them appear on the Stacks project website.
I would like to thank Johan and Grietje Commelin for providing an excellent place to stay during the programmingathon Johan (Commelin, having multiple Johans makes for confusing mail conversations) and I did. And special thanks to their 2.5 year old daughter Hannah for the great conversations one can have with toddlers during breaks :).