I think that WYSIWYG are great. However, when I switched to writing standards-compliant XHTML - I found that it became more difficult to rely on an editor. Both Dreamweaver and Homesite are pretty slick in that they give you "standards-compliant" markup when you have an XHTML DOCENGINE at the top of your document.
The reason I bring this up is because I have been advocating a WYSIWYG HTML editor for Roller - and now there is one! However, after looking at the code generated, I noticed
<font color="#ac5454"> - yikes font tags! I pray that this editor has a "smart HTML" feature - but I doubt it will. Nor do I care - I love the feature and will use it often - I just have to remember to edit the HTML or this site will fail validation.