Rowan Simpson and Koz have released Wingman, a Firefox plug-in that automatically sends the pages you visit to an HTML validation server. This lets you validate dynamically-generated pages locked away behind complex logins. You can tell it ignore certain types of errors, and the website aggregates information about what types of errors are commonly ignored.
I know Rowan and Koz from Kiwi Foo Camp. Rowan was the top tech dude at TradeMe (New Zealand’s eBay), and Koz is a core Rails developer who’s built zillions of websites in his time. Wingman scratches an itch they’ve both felt. Congrats on shipping, guys!