Once we have Core completed (and released), then we will start updating the individual appliances. We already have a batch of appliances that should be ready to build (once Core is finalised).

Following on from that, the current plan is for remaining appliances to be updated ASAP. New versions will be published in batches of 10 (or more) or once per month, which ever comes sooner. I.e. once 10 apps are ready for publishing they'll be built; if it's less than 10 and it's been a month since the last batch build, we'll build whatever is ready. That's the plan anyway...

Out of interest, which particular appliances were you interested in? Perhaps I could give you some pointers and you could help to push a particular appliance forward. Even if you're not very experienced with Linux, I'm more than happy to assist, and if nothing else, perhaps you could at least help out with testing?