I've been working on "PebbleKit JS" support (using QJSEngine). My code is currently on on a branch here: https://github.com/javispedro/pebble/tree/js-testing. I'm still doing large(ish) changes. At some point I hope to clean it up and create pull requests to Smoku.

The above is nowhere user ready, so don't use it unless you're planning to help. You need to drop the unzipped .pbw in a subdirectory of ~/.local/share/pebbled/apps. To show the config interface, run 'qdbus org.pebbled /org/pebbled test' once both the daemon and the UI are up and the watch is running the app you want to configure. Yes, the daemon currently callbacks into the UI but this is subject to change. This is just an experiment. It probably leaks memory like crazy.

So far I've got Twebble to run. Among other things this means I can make its web login interface to show up, and to read my timeline from my watch. However I've implemented only the minimal API required to get Twebble to run, so probably nothing else works. Up next are geolocation and other stuff.

EDIT (12-03): Weather already works too and the UI for configuration is now working (you can configure the currently running app, but cannot install new ones).

EDIT (12-06): Evernote and Yelp now work, including geolocation.

EDIT (12-08): See new post below with updated information.