This is how I handle the issue. Let's say my new site's URL is:

www.mydomain.com/ugas/newsite/index.html

I will make the exact copy of that page and call it preview.html:

www.mydomain.com/ugas/newsite/preview.html

Then I'll put LL recips and banners onto the index.html page, and it will serve for the traffic from LLs (and search engines). I will submit the replica page called preview.html to UGAS for review. So far I had no problems with this strategy. Link lists didn't complain, especially none of the major ones, and they're the only ones that count.

As for search engines... I guess you can put no index meta tag onto the page that's submitted to UGAS, and leave the index.html page for them to crawl... but I gave up on all that SEO crap cause frankly I can't keep up track with SE rules changing all the time, and in my opinion SE traffic is a bit overrated. Btw. two pages with the same content don't seem to bother Google for instance, the page that is most linked to gets high PR and traffic either way. I could be wrong about this of course, so check with somebody who is SE savvy.