joomlis1 As Paul said, you need to match your site up with Google's Webmaster Tools (and Bing's, too, in some areas up to 1/3 of searches) - and as he indicated, begin indexing pages. Don't wait for Google and Bing to find you. Force your way in.
Note, you need accounts for both www and non-www at Webmaster Tools, or you need to use .htaccess to redirect one to the other.
I also recommend a sitemap generator, which will update Webmaster Tools with any new items added to your menus, including hidden menus (a vital component of Joomla SEO, the menus). You can make multiple Webmaster Tools accounts read the same sitemap.
(Forgive me if you've done any or all of this.)