Darn! I am sorry to hear that soccerphysio. I guess all we can say is "better luck next time".
Actually, I was able to get it! It was strange; I went to the Apple store, and was talking with the sales guy about choosing between a new or refurb 2.8 GHz iMac. So he offered to check out the refurb specs online to help me decide, but it wasn't listed on the site. Several hours later, I checked again while at home, and it was available. Not sure what happened, but glad it worked out!
After my discussion with the sales guy, my respect for Apple soared. He told me he would have no problem recommending the 2.4 GHz refurb option in place of buying a 2.8 brand new; he said it would still be an excellent computer for my needs (he did say he would recommend the Apple Care on it for $169 as aprecaution). It was good to see he wasn't automatically recommending the more expensive option.
One question: The RAM in it is 2-1GB sticks @ 667MHz. Can I add 2 -1 GB sticks @ 800MHz to increase it to 4GB, or does it have to be 667? I know, it is probably a stupid question.
Now the waiting game; it may not arrive for a week!