What is the most effective way to save money for a home down payment?

My husband and I are ready to start saving up for a down payment on a home. We can set aside $400-$500/ a month. What is the best type of account to save our money in that will yield high interest? We are new at this, so any information would be great. Thanks in advance!|||The highest interest account I found is through ING. Website is www.ingdirect.com. I keep my extra money there; have had the account for about 1 1/2 years and very happy with it. It can pay higher rates of interest because it's an internet bank rather than having lots of brick and mortar locations. You link the account to an account you already have and that's how you transfer money into and out of it.