Google XML Sitemaps

Hi there,

I'm running a network of blogs that are all using domain mapping, to avoid publishing the subdomain version of the URL.

So:

site.subdomain.com
is mapped to:
domain.com

When I download the Google XML sitemap generator, I am concerned that it is generating the UN-mapped domains, and presenting just the subdomains.

Can someone help me here?

I want to take advantage of the ability to multi-update across Google, Yahoo and Bing's Webmaster Tools.