that's interesting, .. it's an html4 dtd when you view the source. i guess it's all xml if it's well formed enough.
you could get around the hesiation of people not wanting to click on a .xml file by just making it .php and forcing the header content type to text/xml.
it might be cool to launch 2 brand new similar domains with the same content except 1 xml and see what the comparison is between the 2 in the different search engines. any ranking takes time though and i don't have that kind of patients
