There are a number of Daniel in Atlantis fics in the Daniel/Weir community achives. You would have to serch through the achives most to the beginning of the community to find them but there are quite a few. I've placed a link to one of the archive to give you a start.
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Date: 10 August 2009 06:36 am (UTC)http://community.livejournal.com/daniel_weir/2006/08/