Today, I have reloaded OS X twice on the MBA 1.8 SSD (which I purchased from a local Apple store last night since the ordered unit with iWork has a non defined delivery date) due to a hiccup on the first reload. I omitted unnecessary printer drivers, languages, and optional software and gained about 8Gb of drive space, showing nearly 47Gb available for whatever. I tried using wireless on file transfer and the ethernet with the dongle was faster going through the same 801.n Airport Hub that was three feet away. The Superdrive was definitely the way to go to load programs. The unit feels snappy on doing installation work and moving files around from iDisk etc. Most of the time the fan is silent. I think whoever gets one will be pleased with all aspects of this computer keeping in mind all the constraints.
I installed the Verizion USB WWAN modem drivers for a test drive. It worked fine for an internet connection. However, with no printer available because of only one USB port, the only choice is to print to a pdf file and print the document out later or on a remote printer. I small powered mobile laptop USB Hub might solve that problem. iDisk access is really slow over the Verizon connection.... Musical chairs with three USB devices while loading is tedious. Under normal situations, one would load from a CD/DVD using the Superdrive and then switch the connection to ethernet/wireless to check for updates. One will want their system printer to be on a Airport USB hub or ethernet so one can use the USB/ethernet dongle if their wireless connection is slow.
That's my story to date.