hi oui,
i just read about genie/vala a few days back and found out that the puppylinux guys have already started using genie , no particular programs are puppy browser and pictureviewer available in /usr/local/bin ( just checked it out in qemulator today).
i really want to learn genie as gui programming seemingly becomes very easy. if you are interested barry kauler has already started some tutorials here
http://puppylinux.com/genie/ , i know only a little bash/ash scripting, but i think genie/vala could be of use to add a lot tools in slitaz.