Question about domain mapping


I've read through several messages about domain mapping and my poor head is swirling a little bit with contradictory information so I'm hoping someone wise can set me straight:

We have an install at, say, with multiple blogs.

Each blog will have its own subdomain AND domain, i.e. will also have on it.

My question is -- is it possible to have it so the full domain, be fully used throughout the site rather than simply be redirector or parked domain?

If I'm not clear enough on this, let's say user goes to -- will it also work if they go to and if they click around, it will stay