Not so much madness actually because aside from one hiccup things went pretty smoothly.
First some comparisons:
Original Mini, first generation model from January 2005:
512MB RAM PC-2700 DDR SDRAM
40GB disk
1.25 GHz PowerPC G4
ATI Radeon 9200 GPU with 32MB VRAM
Two USB ports
Firewire 400 port
10/100 Mbit ethernet
1 modem (remember those?) port
Hard disk and CD/DVD drive both (P)ATA
Then in comes [...]