Creates Flex module chrome....

modchrome_flex
same as html5 but allows title area to have styling separate from title tag styling resulting in moduletable, moduleheader, and text background all separably styleable
Image below gives you a rough idea of what would be possible using just 3 css element declarations..
.moduletable {}
.moduleheader{}
.moduleheader_txtbg

![capture](https://f.cloud.github.com/assets/1850089/1228684/dbfe8d42-27a8-11e3-8210-88fde51759f5.PNG)

While this could be a separate template override, due to its extreme flexibility and easy styling I think it would be universally usable ergo warranting inclusion in core.