Fancy Forms: HTML5 + CSS3 – JS

Ah, you're right, they don't. Hmm. They have a + inside of a circle (labeled "Add"). There's also a check mark inside of a circle (labeled "Accept"). I suppose you could consider those.

Or even having no icon at first. Then the red icon (or a red cross, labeled "Cross") appears if the field data is invalid.

Just my $0.02. Very cool effect though. I dig how it works when I tab into each field too.