Funding has been agreed to allow Scratch 2.0 to be developed. Basically this will be much more web based and allow embedding (into Facebook etc). I guess then this will allow a work round for iPhone and Android Apps to be developed (ie using safari in full screen mode).
There is a workshop for educators in the 11th Dec at the MIT Media Lab. Find out more at http://events.scratch.mit.edu/
Scratch is currently version 1.4 and runs on Windows, MacOS and Linux