Title says it all. Just bought one BTO (1.8/4GB/256) online. I was really disappointed there was no 8GB memory option, and I honestly believed I wouldn't buy an Air without it. In the end, I think I subconsciously compensated with the shiny new CPU and backlit keyboard. I'm so weak... One thing I'll share about the "experience" just in case it factors into anyone else's purchasing decision for this BTO configuration: The online store mentioned delivery time of "1-3 business days," but after I placed the order, the order confirmation had an estimated delivery date of 7/29. I'm really looking forward to my first ultralight laptop!