Enforce the laws on the books and stop the flow across the border first. Then take the necessary steps to address the situation with those here illegally. I would favor a plan that eventually leads to citizenship not blanket amnesty.
I also think a guest worker visa would be in order as well.
The Arizona plan may force the issue on the Feds to address rather than ignore. Both sides need to get a grip. The plan does not call for Gestapo-like tactics with individuals being stopped and being asked for their papers willy-nilly. However there could be abuses in the system where such a thing could occur; particularly if you are Hispanic.
So everyone quit grandstanding and work this out. Thank you.