no not really, i suppose i should.
I find the errors they have are very fickle and my target audience will not care whether it is validated or not. I don't think it affects my SERP either.
The only positive from validation would be to perform an industry standard?
Possibly a requirement for a corporate site, or for your own brochure site as a web developer.
I'll just sit back and wait for the onslaught.
In the meantime tho i may just try and fix a few of those errors