Ten paying clients later.
noeltock.com
noeltock.com
I like how you're personally contacting clients. Obviously that won't scale once you've got dozens or hundreds of clients (and I believe you'll have that, soon), but for now that's a fantastic way to get great feedback and make those first clients feel very special.
You say you don't have a good way of explaining the importance/benefit of microdata to clients - why not? What have you tried, and what do they not understand about it? I'm curious as to what reactions you've gotten - I think that could/should be a fairly big selling point if you're able to execute on it well, but obviously it's not much of a selling point if the prospect (or client) doesn't understand the value.
Looks like the OP should have plenty of business - but one thing I've noticed is that many people who otherwise have a good sense of taste and decency for interior-decorating have none of that when it comes to web design, so they might not even notice how bad their websites are...
Regarding the microdata, we have clients that upload their logo as PDF, others try to attach PDF food menus to a food item image, it's basically another league :) Right now, we're focusing on trying to sell mobile as an advantage as many other providers charge disgusting money for that. For microdata specifically, we just say "SEO optimized" (and that needs to be explained too).
onlick="this.blur()"
or perhaps a more elegant jquery solutionHope they're not paying for WordPress consulting.