I record my miles on a programme called SportsTracks, it also records equipment use and I can set a replacement mileage. For all my bikes I have put 10,000miles as it seemed a huge number. Well kiwi (my spesh langster) went past that mark this week - although it probably happened earlier as there have been lots of short trips I haven't recorded. I've had this bike just over two years but its my commuter and since most of my miles have been commuting it shouldn't be that much of a suprise.
But wow my little bike has done over 10,000miles.