Suggestions:

In a couple of spots, the edit HTML dialog overlaid the items I was trying to edit. I attempted and expected to be able to move the edit dialog around the page and out of the way of what I was editing.

On my own site, I was particularly wanting to play with colors/themes. Not sure what the best way to implement this is, but the only way I could do that through this interface was with style tags.

Awesome product! I will likely use it in the near future.