At 5pm yesterday, I took my Mac Mini to the local FedEx store in Burlington, Mass. By 10.30am this morning it will be at macminicolo.net in Nevada ready to be installed in their data center. There is a good chance the machine will be online by 5pm today.
FedEx really is an amazing thing.
UPDATE (2005-07-15): Yep. It's online (and I've corrected the link to macminicolo.net — thanks to Joe Weaks)