You know, as much as I absolutely hated my original MBA, I did sell it a week before the new one was announced at only $150 loss plus taxes and shipping. So, I agree, with the rev B MBA, you are not going to lose too much.
I have used the new MBA 1.6 with HDD. I agree it is still a very worthy computer. It is much faster than an original MBA at 1.8 with SSD. I would use any rev B MBA as a primary computer. If I didn't have to reboot four to five times daily, on work days, I would have just bought the lower end model.
I am having a problem with drive space. I think if the new MBA whenever released, has 4 GB of RAM and a 256 GB SSD option, I will buy it. However, if it doesn't have 4 GB RAM, I may just try to upgrade the SSD myself. There is a thread that was just opened today by a poster who determined how to make a SATA drive work with an LIF connection. If the poster is successful with their own, I am going to look for a larger SSD for my MBA and NOT upgrade the MBA itself.