Let's just see how close this comes ...
$1199
20"
2.2GHz
1GB RAM (up to 4gb)
250GB HD
SuperDrive
8600 - 128MB
$1499
20"
2.4GHz
2GB RAM
400GB HD (or 500GB)
SuperDrive
8600GT - 256
$1799
24"
2.4GHz
2GB RAM
400GB HD (or 500GB)
SuperDrive
8600GT - 256
Seems pretty likely. I had this idea that Apple may add a tray loading 2.5" hard drive bay to the side for use with Time Machine. That would be pretty nifty, just using it to back up media files to one drive and stick another in for regular backups of documents. Sort of like those 30 GB Zip Disk drives, but Apple branded and much bigger in storage.