Swanny007 - 5:15 pm on Jan 16, 2008 (gmt 0)

Interesting.. Here in Canada our postal code tells you what street you're on plus whether it's an even or odd number (i.e. which side of the street). But I guess when you use three letters and three characters you can have a lot more granularity.

I guess the US won't have much choice but to add some digits. It's probably too late to add characters, but characters give you a lot more possible options (26 vs 10).