Here's some more things I've found
1) Cheaper
2) Better speakers
3) Unfortunately no G5
4) It's more expensive than a Dell but unlike Dell when calling customer support from the US you get someone who natively speaks English and you can just bring it in to any Appple Store and get assistance.
5) Video card is crappy, Crysis in full detail turned up just doesn't work... (ripped off IMHO)
6) It will run faster than a G4 iBook
7) Seems to be good for trollbait threads
8) Doesn't have a 1.44" Floppy drive
9) You can't upgrade it to an i7
10) The monitor is brighter, in fact so bright that the words I am typing are being burnt into the back of my skull
11) No firewire
12) The 8GB of DDR2 ram I bought to upgrade it wont install...
Fixed it for you.