Everyone is waiting to see what happens with all the lawsuits in AZ would be my guess.

>Arizona's sweeping new immigration law doesn't even take effect until next month, but lawmakers in nearly 20 other states are already clamoring to follow in its footsteps.
>http://www.fayobserver.com/articles/2010/06/25/1009409?sac=Home
>
>The article lists other states as well, but it doesn't appear than a similar bill will actually go through anyplace else this year:
>
>Bills similar to the law Arizona's legislature approved in April have already been introduced in Pennsylvania, Rhode Island, Minnesota, South Carolina and Michigan, but none will advance this year.