Ephox has had Yonas working on with us on various TinyMCE related stuff for a while but mostly outside of the core source code on plugins for various clients. Today however, his first patch made it through both Ephox QA and the Moxiecode review into the mainline TinyMCE codebase. It will ship as part of the 3.4 release along with a bunch of other Ephox developed fixes and lots of good stuff in general.