Here’s a neat discovery by Andrew Ozz: you can actually style the content of the WordPress WYSIWYG editor so that it displays how text and images will actually look like once posts are published. Matt Thomas, who leads the development for the new default WordPress “2010″, calls it WYSIWYRG (what you see is what you really get).

You get a great sense of the way your text will interact with images when you’ve got a little bit of your theme right inside WordPress.

All you need to do is add several lines of code in your theme’s functions.php file, which calls a specific stylesheet file for the the post editor. It’s not a 100% seamless method, but now that people are talking about what could be a a value-added feature to WordPress themes, perhaps developers can figure out a way to better apply theme styles while composing blog posts. It’s also a significant step forward in WYSIWYG editor usability!