I love my mini (I've got two) except for one thing - it can't drive multiple monitors.
I've got an XP box at the desk, and if the mini could drive both of my 19" monitors I would drop the XP box in a heart beat.
So now I'm considering getting the new 20" iMac and selling one of my 19" monitors, and running Parallels for my XP needs on the second monitor (mini DVI port on the iMac).
But I hate the front bezel of the iMac. It puts the bottom edge of the monitor like 8 inches above the desk. My 19" is just 2 inch above the desk, just barely above my keyboard. I like my eye to be level with the top of the screen, not the middle or bottom.
Hopefully Apple will resurrect the Cube and give me dual monitor support and 3.5" drive in a mini form.
Is the New iMac a Mac mini Killer?