For several months, I've been thinking about getting a Macbook air. I heard that the update would be released this summer, so I waited for that. Now that it's out, I'm wondering if I should get the 11'' or the 13''. I'm a graduate student who takes her computer everywhere. I use it for notes and papers and (lots) of internet research. I'm on my computer for several hours every day. Is the 11'' screen going to be enough for me? Will the increased size and heft of the 13'' make a big difference? I currently own a 2009 13'' white Macbook. It works very well- I have no problems with it- except that it's a bit heavy to schlep to and from school (so, again, I wonder if I get the 13'' Air will give me enough relief to be worth it). I'm a little disappointed that the new version doesn't have 3G built in. I had heard a rumor in February that Mac might include that in their update. Do you think that it pays to wait for the next incarnation in hopes that they'll put it in that one? Or will I just be waiting in vain? Thanks to everyone for your thoughts on this.