Algebrator - 5:43 pm on Dec 3, 2004 (gmt 0)
From my (very limited) understanding, you can approach it in two different ways - the one you described (everything on a single domain), and then there is another one where you have your real domain and bunch of cloaked ones that redirect to real site. In this way you isolate yourself from the risk of having the real site banned, while cloaked domains are expendible.
Now, my question (and apparently the one by the original poster) relates to 'expendability' of these. If they do have to have a certain amount of PR (or incoming links) then they are not that expendable, are they? (particularly with sandbox effect and such). And it seems that they do, since on-site all by itself is not going to work, no matter how perfect