Oh, I feel your pain, post vacation depression is awful. We have been home 2 weeks and 1 day. 2 nights ago at dinner I informed my DH & kids that I wanted to go back in January 07. Kids had no issue! DH was a little hesitant as I think his knees, ankles & feet still hurt
Here was my reasoning:
"Due to DD's upset tummy I didn't get to ride Test Track. This was our 2nd trip to WDW and I still haven't ridden Test Track, that's it we have to go back."
Besides that I say, "Grandpa is not getting any younger and we need to visit them in Tampa as much as possible, since we will be going all the way to Tampa again next Christmas"
"we will?" says DH,
"don't you remember? I say, we discussed this while we were still in Florida in January",

he gives me the look.
Anyway I continue, "I think it is only fair that I get a chance to ride Test Track!"
"Besides" I say "I also didn't get to ride Tower of Terror"
DH's response, "you won't ride TOT, something about there not being enough bladder control devices to ever convince you to ride TOT"
well I say, "I was working up to it, I was planning to give it a try, but since DD was ill, I didn't want to deprive you and DS of the thrill!"
(Again the look)
The final response from DH, "okay, get me some numbers",
of course I was prepared, he didn't stand a chance, WDW here we come again 1/1/07!!!!
Nothing better for the post vacation depression than to start on the next vacation!
Hang in there