Jeffrey Zeldman’s come up with a pretty sweet plugin for Dreamweaver.
Jeffrey Zeldman’s Web Standards Advisor
http://www.zeldman.com/2009/01/12/jeffrey-zeldmans-web-standards-advisor/
From the way he talks about the concept, it “whispering in your ear” (Can I select the ‘Anna British accent voice’ option, Mr. Zeldman), it seems like an interesting tool. Whether it whispers or not, I think that my and many other’s CSS/XHTML code would end up much cleaner at the end of the day. Way to take that concept and make it a reality!
At a $50 price tag, worth the affordable investment I’m sure if you’re coding CSS every day.