Just turned 60. My kids (loose description as both in their 30's!) both have iphones and are definitely jealous of my Desire (although won't admit it).
Re Battery - Having had Ipaq PDA's for years, I get much better value per battery charge out of the Desire than i ever did with PDA's - its a preception thing as many people compare battery life of the desire with mobile phones, which is not really right. The desire is a PDA with telephony, and as such I think it does brilliantly. (just wish it had an office suite).