Will New Airs Require New Cases?

Hey guys, after about one year of waiting for the new Macbook announcements, I've finally decided on a 13" MacBook Air (even though until last week I was still thinking I'd get a MacBook Pro). My question to you all, especially those of you who have picked up the new Airs, is will the old cases work with the new Airs? It's my understanding that the body is virtually the same, but I hard someone say the USB ports were moved to opposite sides now. So should I wait for a new case, or will existing ones do?

I have to wait a week to purchase anyhow as I haven't fully decided whether or not to get the 128 or 256 GB model...Thanks in advance, and sorry if anyone else asked this question (I checked the forums and couldn't find a duplicate entry).

=JJ=

Thanks so much KylePowers, I knew of the upgrade to USB 3.0 (something I'm really excited about since I have a couple external USB 3.0 harddrives) but didn't know the Airs always had one on each side. Thanks for the info and I'll definitely be checking out that case you recommended. I really appreciate it 🙂.