If you have been with Allstate for quite some time, call your agent and tell them to re-write your policy. I called to tell them I was canceling my policy soon since my buddy at State Farm could save me hundreds. Ends up I had one of their "old policies". He re-wrote the policy with Allstate's newer policy and my premium went down about $150 a month.
I don't know if the "old policy" thing is bs or not, but it worked for Bert (sanddunesaddict) as well since he also has an old Allstate policy.
Whether you have been with them a while or not, it's worth the call. Just tell them you are shopping around and looking to lower your rates.
Just a heads up to save some cash.