I've had a couple of nice emails recently which give an idea of the age range of Chirp! users. First was a link to a family video showing 23 month old George and his amazing skills at bird recognition - apparently he has liked birds since he was old enough to point :). You can see the video and read George's dad's blog here: http://bit.ly/GUbnT
As for grown-up users, I know there are several that are older-than- the-average-iPhone-user. It's interesting how an interest in technology isn't so much linked to age, but to attitude. When people ask me what I do, I often have to explain what an iPhone is - almost always to anyone over 50 but even to a 20-year old on one occasion. Yet today I received an email from an 80 year old Chirp user :). Nice.