A friend of mine has created a website to track mileage and services for the bikes/cars. I find it very useful as I mostly do maintenance myself but I tend to forget what service is due and when it is due... And all my paper record is a mess. This system allows me easily to track when the services has to be done (based on mileage, time or both). It also provides different stats if you care to put your mileage in and gas fill ups. All your records can be exported in excel format.
Here is my K12GT (yes I record every fill up for that bike :-))
Try it out. Who knows you might like it and find it useful as well.