6
dummy html start page?
not even...
the most optimal way to get picked up is to have a kick ass home page on your root URL.
xoops is great for this. using a combination of module's blocks and custom blocks, you should be able to get whatever you want on your front page.
As far as i know, some search engines, like google dont really like redirects from the root domain name. I could be wrong and they could change it anytime, but whatever your site is about, an index of all the inside content, should be cleanly, precicely summarized on the front page, or the root index.
xoops modules cannot be easily indexed by google when the page contains a bunch of dynamic variables, but this applies to ANY dynamic CMS.
The solution here would be to implement mod_rewrite, which is usually a custom solution for each module you want to install.
The best trick of all, is just to have pure organized content... If you have to 'trick' the search engines, then you are doing something wrong already.
Best Regards,