Well, notability is not policy, merely a (very argued-about) guideline that not everybody believes in anyway.
With that out of the way, I can't see any reason why the short amount of verifiable information about these contestants can't be inside the article for this season's So You Think You Can Dance, or inside [[So You Think You Can Dance 2006 contestants]], with redirects (or disambiguations) from the individual's names to sections within it. I think that these people are not sufficiently interesting outside the context of the competition, and that having seperate articles for them merely encourages unsourced, unverifiable cruft.
-Matt