Yea, this thread comes up from time to time and I always feel like I need to post. There are a few trucks that have more miles then I, but they are certainly in the minority.
I am at 246,000 estimated miles. I say estimated because my odometer is off due to the larger tires. I was pretty negligent in maintenance in my trucks early life. I was good about oil changes, but that was about it. I changed transfer case and both diffs at 150k and am doing all three every 50k now. My transmission I left alone based on recommendations.
To date I have replaced the Starter, wheel hubs, alternator, AC compressor, and water pump. In my opinion those are pretty normal parts to replace given my mileage, and they are still cheaper then having to make car payments. I did have to replace the tranny at 210k miles, that has been the only major replacement I have needed.
I fully intend on breaking 300k miles on this truck. I also have purchased a parts truck and fully intend on replacing the engine sometime down the road. I will not mess with car payments for a while.