I'm also a first time Mac user! I just got the 13" MBA and I love it. When I go back to my old Win7 laptop, it's so much slower in comparison. I lot of it has to do with hardware obviously, but I'm spoiled by the MBA speed that I loathe to go back to my old Acer.
Anyway, I also have a boot camp partition. I thought I would use Win7 as my primary OS, but I'm learning to like Lion more and more. It's now my default partition on booting up. I recommend installing Chrome also and forgoing installing Adobe flash on Lion. Chrome has built in flash support that seems stable to me. Plus I'm just used to the Chrome browser.
Anyway, I also have a boot camp partition. I thought I would use Win7 as my primary OS, but I'm learning to like Lion more and more. It's now my default partition on booting up. I recommend installing Chrome also and forgoing installing Adobe flash on Lion. Chrome has built in flash support that seems stable to me. Plus I'm just used to the Chrome browser.