Since it uses the same header and footer as your other pages, it should look the same to search engine spiders.
However, I have not tested it with other plugins that manipulate the header for spiders. In theory, it should work without any changes. If you want to be sure, you can look at the source from your browser.
Is it possible to display a page other than your templates?
You can create your own template.
Hi, I posted a question at http://cochinoman.com/2009/02/16/wordpress-plugin-for-splash-screen/ but I’m not sue if that’s maintained. Question is: does this block search engines from indexing a site, i.e. they can’t get through the ‘Agree’ button? Thanks, G.
