With AAA you get a FREE HD DVR (which everyone does), and a FREE 2nd HD Receiver or a 2nd HD DVR for $99 instead of the standard $199.
Also with AAA you get $10 off your bill for 24 months. D* gives you $23 off for the first year. So even if you are happy with E*, in these hard economic times it makes since to switch.
And if you don't have AAA you can sign up for that for just $20 for the first year and $52 the second. I would imagine you have to keep it for the full 2 years to keep getting the discount. Just deduct that from the $340 you save by having AAA. :up