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A lawsuit brought in 2006 by a blind student at the University of California-Berkeley has now morphed into a class action case against US retailer Target. A federal judge has just certified a nationwide class in the case, which alleges that Target's web site is not fully accessible to the blind. It's a case that could help establish the ways in which the Americans With Disabilities Act applies to the Internet, and it has already generated a ruling that, in California at least, commercial web sites must be accessible.