Has anyone here used "Scrub The Web" for SEO? Or is there a BETTER company?

I'm seriously thinking about signing up with Scrub the Web dot com for some SEO tips and they also say they can do lots of things. Here's one that fascinates me (a line from their site): "(X)HTML Validator™ and Correction Tool - make your Web pages error free! The first SEO inspired (X)HTML validation... show more I'm seriously thinking about signing up with Scrub the Web dot com for some SEO tips and they also say they can do lots of things. Here's one that fascinates me (a line from their site):
"(X)HTML Validator™ and Correction Tool - make your Web pages error free! The first SEO inspired (X)HTML validation tool on the Internet. This tool will make every attempt possible to correct (X)HTML errors in your Web page's (X)HTML source that can affect your search engine visibility."

I don't know much about .html, unfortunately, and my little do-it-yourself website has some errors in my source code, apparently...at least according to this free scan I ran on my site. It says I have 31 errors in my site! So I'm thinking OMG! You can see them here:
http://validator.w3.org/check?uri=http:/...

Could anyone that knows what they're doing at least tell me if this is something I need to WORRY ABOUT? Everything seems to "look okay" to ME on my site... and I know for sure all the links on it are good. But are these other things listed there bad enough that you think I should do something about them? Could they themselves be hindering my ranking?

THANK YOU SO MUCH for your educated opinion...(said ahead of time to whoever answers that HAS an educated opinion! LOL!) Tell me just how educated IS your educated opinion when you answer, please.
That's right! Blow your own horn! THANKS AGAIN!
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