Can you see yourself selling your ipad 2 less than one year from now for half the price you bought it for, just to upgrade to the ipad 3? Hopefully something that you sought after everyday for probably a month would hold some sort of sentimental value when the next one arrives.
I don't know about the "half the price you bought it for", a friend of mine sold his 16gb wifi only iPad1 two weeks before the Apple announcement of the iPad 2 for $450.
I was happy for him but he is still hunting his iPad 2 currently.