I went to an Apple Store today (Southlake, TX) hoping to get the 13" MBA, 128 with 4GB Ram. I was told NO STORE carries the mid level models with 4 GB Ram. That in order to get those, then one has to order online.
He stated they carry all the 2GB models in the store and the "ultimate" models with 4GB. Needless to say I didn't want to spend $1850 (after tax).
I'm going to Vegas this weekend and I'm going to check the Caesars store to see if the information I was given is correct.
Otherwise I guess I'll be ordering one when I get back.
I'll save you some time, the Caesar's store and the other vegas store at the "Town Square" only had 4gb on the "Ultimate" editions when I was there for a conference last week.