I just wanted to report that I had great service from Apple last week. I got my air in November and all was well. A couple of weeks ago I noticed a tiny black spec on the screen (less than 1mm ).
Knowing I had a month left on the 90 days I went back to the apple store in truth expecting to be told to live with it as it was so tiny. Much to my surprise the assistant took one look at it and offered a brand new replacement!
The did not have the white 128G in stock so I had to wait a week but true to their word they called when it arrived in and I went and exchanged it. Perfect customer service from Apple and of course I have another 90 days now as this one is new!
Also. I purchased a case from a Canadian seller on ebay, the case cost $7.49 US and I was so happy with it I ordered another colour. It has the magnetic plastic cover that is to my eyes identical in feel and operation as the Apple cover and the back is a hard shell that is coloured the same as the cover though transparent. The nice things about this case are obviously the cost but not so obvious are that it feels of very high quality. All the holes are cut perfectly to fit the various buttons and holes on the air. A nice touch is where the speakers are. They could have cheaped out like a lot of after market cases and just left a gap there but not with this case. It has tiny pin prick holes just as in the leather Apple case. The best bit though is that it is ultra slim! I hate cases that are bulky, it takes away from the whole point of having a thin tablet!
I ordered the purple and now the green which should be here next week.
Oh, and whilst the air stays put in the case it is very easy to remove if you need to!.
Here is a link, great seller and highly recommended.