My cyclocross bike came into the family in April. Many road miles till I got my road bike in October, it commutes to work in nice and in ugly weather, and actually goes and plays CX, too. In all likelihood, this bike will see 3-4000 miles by it's birthday next April.
Does it make sense to replace the bottom bracket as a preventive maintenance item, or wait until failure? This is the Performance Fuji Cross Comp build, with 105's using the FSA crankset and I think BB.
Since I ride this bike a lot - and will use it on group rides all winter, so it will still get a wide variety of ride type in different weather - I like the Chris King BB since it is designed to be easily serviced (the engineer in me likes the maintainability built in - the ability to easily re-grease seems to be a great idea).
It is kinda funny - been babying the new road bike and just riding the snot out of the CX bike, and just realized in my bike repair class at the LBS that it is really the everyday bike that needs the TLC to compensate for all of the ugly riding it sees (the ugliest riding being the simple fact that it is my butt in the saddle).