Perhaps I reacted to rashly....

Is the real question these fellows are asking "How does this work? And how do I make it work?"

My answer:
Start by reading the very good overview on the  Allstar Link site.  
In particular the ABOUT page.
And the GET STARTED page.

Once you grasp the concept, come on back here where you'll find lots of people to answer the rest of the questions.

Once you get the node(s) running, you can do exactly what you are proposing.
With two repeaters, twenty repeaters, thirty repeaters...........

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From: "DougH" <specialq.que@ntlworld.com>
To: "Robert A. Poff WB3AWJ" <wb3awj@comcast.net>
Sent: Tuesday, December 6, 2011 4:09:05 PM
Subject: Re: [App_rpt-users] Two remote nodes used to link two repeaters