Mónica Calvo of Eendar (also of Organic Fields) produces some beautiful illustrations, some of which make it to her downloads department (see: descargas) for use as desktops.
There’s little more to say than, well… beautiful.
For reasons unknown, the W3C markup validators (both the standard and beta versions) are currently experiencing technical difficulties. And when I say ‘technical difficulties’ I mean they’re failing everybody.
Go with the WDG’s HTML Validator until further notice.