front page

Hi folks --

I'm building a site where I want anonymous users to access none of the site's real content until they log in.

However, when a user first comes to the site prior to login, I'd like them to have a decent page telling them to log in, and where they can see the login block.

My current method includes:

-- the Taxonomy Access module (so that I can use a category tag to specify that one of the pages will in fact be viewable by un-authenticated people, that's the page I'll make my home page for the not-yet-logged-in people)

Could someone tell me how I can have two front pages, one for anon and the other for authenticated users?

That is, you see one page before login and see different front page when you log in. I got to work it to redirect authenticated users to front page for authenticated. But if the user tries to see the anon's front page, he would be redirected back.

Another question:
Which module (or something else?) is used to have the side block for Group categories that shows Dojo Tags?

Thanks.