I am creating a Custom EditorPart in VS 2010 and have it all working as I would like. The only issue I want to fix is that I want the custom parts to look like the Appearance and Layout sections. I thought by supplying a category option that it would work, but since the controls are custom, the webbrowsable piece is not needed. I thought I could pull it off with css but this is not feasible at this time. Any pointers would be greatly appreciated.
Update 1: I have used some tools to get to some things I think I need. The RenderEditorPart and EditorPartChrome objects seem promising but these seem to be reserved if you are creating the page that the webpart is in. The other EditorParts use these so is it possible in just a custom EditorPart.
Update 2: So I did find a way to make this happen with jQuery and CSS. I will be making a blog post soon. It looks cool enough!