Hey, I'm an AppJet early adopter who keeps kind of a low profile. I made a wiki that I think is a pretty good core for the efforts of others (wikijet). I haven't added any improvements in a bit, though.
Of real use in the world is a related app called markdownme - pass it some Markdown-marked-up text and it returns HTML via a REST interface (other AppJet pilots may find lib-markdown more useful - it's not mine, it just uses the same third-party Markdown library), and the legendary Bucket of Truth, a very simple "wallet"/cash-tracking app intended for mobile phone use.
My current project is MetaJet, which aims to be the ActiveRecord of AppJet. It's a big job; come help.
I have an actual home page at Gibberish.
HAVE A PLEASANT DAY DAMN YOU