The text area is small for editing articles, the same size as the "summary". It would be a lot more enticing to build the pinax wiki docs here at code.pinaxproject if there was a nice large area to do the editing in.
There are lots of places where the TextArea containers are too narrow. Might be best to just fix them all in css
No, we don't mix issues. This is reporting an issue in regard to CPC. If you want to file a task that deals with other small textareas do that, but don't mix things.
Well, I got a plugin to FF that makes them resizable so I have no excuse for contributing to wiki :)