Here is a quick tip if you need the Id and name of a site that you just saved as a site template.
To get Name of the existing site template(that you force need if you are making sites by site template programmatically) follow the not more than steps :
1. Save a Site as a Template.
2. Go to Site Actions > New Site > Custom.
3. IE Tools > Developer Tools > Find > Select Element By Click > View > Source > DOM (Element) > Highlight and copy the section
test . The one in bold will be your site template name.
To learn how to make a site by a site template programmatically see my post @
Programatically make Site from Site Template Sharepoint 2010
Check it out:SharePoint Programming
Nice tip. Here are some other ways.
http://praveenbattula.blogspot.com/2010/08/know-site-template-used-for-sharepoint.html