I placed this here instead of the alpha/beta forum because I am using the multi-user aspect of 3.0 beta and there will probably be more likely chance of getting an answer here.
I tried the Google XML Sitemaps plugin, Version 3.2.3 and it has a problem with multi sites. It works fine for the first site. But when you add a 2nd site it adds the 2nd site map to the first site's site map and notifies Google. Since the 2nd site site map doesn't match the first domain, Google gives an error (and rightly so).
I searched this forum for "sitemaps" saw other requests for this issue answered by "why do you want an XML site map?". I will go ahead and answer that because I have experience with XML sitemaps with a popular Vbulletin forum I own. They work to get your pages indexed faster and updated more frequently which is very important when you have a lot of pages and also pages that change frequently. It is especially important if you are using Google custom search, which I do.
So does anyone have any solutions to automatically generating XML sitemaps for Google, yahoo and others to use that will work with MU? (also 3.0beta).
I will go ahead and contact the maker of the Google XML Sitemap plugin and see if they have any solutions, meanwhile I was hoping there might be other solutions, plugin or otherwise.