Typically, if you want to make sure your site is indexed in Google, you would use a site command (i.e. site:www.domain.com) to see if Google returns results for your site. You can also search on just the domain (i.e. www.domain.com), specific keywords for your site or sign up with Google Sitemaps and verify your site.
Via a DigitalPoint Forums thread, I spotted a new way (I know it is not new, but new to me) to see if your site is in the Google index.
Go to google.com/webmasters/tools/sitestatus and type in your domain.
It returns with details about your site, a way to encourage you to possibly sign up with Google Sitemaps (Webmaster Central) to get more details. Here is a screen capture of this site:
Forum discussion at DigitalPoint Forums.