Requesires registration
Anyway I tried it out, and DN Lodge got a 60/100. I think it's totally unaccurate.
The only 3 things it said was bad about the site was that we don't use H1, H2.. and that the CSS was not in a seperate file, and that our design is not done fuly in CSS and DIVs.
These factors don't have a HUGE impact on SEO, and they definately shoulden't take 40 out of 100 points off because of those factors.
I personally don't think SEO can be judged by a script, rather only by a human.
But anyway, I would uggest using it just for fun and not take the scores seriously, but it's pretty cool