Look in the top bar at the top of the page after you have logged in...

To see the site login (aka index) page again just click on the header at the top of the page. If you have created an index page beforehand that will not be used by the site and I, if I were you, would just use it for tags that search engines could find.

Now there is an idea - anyone want to create a plugin that will generate an index file at fixed intervals with the tags listed in it.