I think a lighter iPad would be better than 2 batteries. Most people on this board are saying they will use this device at home. If that's the case then recharging would be a snap. If you're at a cafe or wherever you can use the outlet to recharge if you plan on using it for more than 4 hours at a cafe. All of you said you wouldn't be using it for more than brief FaceBook and email moments anyway so going past a few hours on a single battery shouldn't be an issue. Right?
So now you have to choose what camp you're in. Either you stick with your camp which means you don't need a dual battery (which means it's not the best design after all) or you switch camps which means that the iPad isn't the ideal portable device becaue you can't use it like a netbook.
I'm just going by what you guys have been flaming about.
Personally I'll still buy a 2nd gen iPad and hope for a wireless keyboard solution made out of fabric or other non-hard-plastic material that I can fold up and use on the go.
For me the battery life of the device was one of the key selling points. Being able to use it for a full day without a charge is key for me. A huge part of the utility of this device is it's mobility. Having to strap it up to charge every couple hours would ruin it in my opinion.