Theres some sample screenshots of the doorway generator available to our partners here;
http://www.dirtygold.com/traffic.htm
(scroll down to the bottom of the page)
you are much better off with one good gate, rather than 100 shitty ones... and my feeling is after doing this for a long time, is that there is a threshold 100, 200 whatever doorways per domain before they loose rank as spam.
If you do a small change to each page prior to resubmitting, they often rank a little better. So in otherwords, if the page is for a popular search term and the robot sees the same thing as the last time, the little spam light may go on in the algorithm and your page might get bumped down a notch or two
once you get good you should cloak your pages
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