The OFFICIAL website is hanson.net which is full of up-to-date news, tour info, pics, music, forums, store and anything your heart contents (except the band themselves- they only come to your door if your a member haha).
The best source of un-official info is from hansonhotel and hitz diarywhereby you can usually download the latest TV appearances, radio interviews etc. and they are pretty much on top of the news on the band. (spookily enough they sometimes know before the band themselves also)
There is also the Hanson Hotline where you can listen to Ike ramble on about what's going on and leave a message. The number is 918-446-3979
Wanna contact ME?
I am usually found in the hanson.net forums under the name MyIllusion arguing that "YES! English music could wipe the floor with America's when it comes to the breed of local bands!" and other such 'important' matters =)
Also if you would like to buy me something shiny (cos ya'll love me!) then click here!