In reply to TheDrunkenBakers:
As others have said, heart rate is personal and if you want to use it in training you really have to watch it regularly to figure out what is normal for you.
In general, your resting heart rate will decrease as you get fitter, although how far down it will go probably depends on other factors including genetics. You can watch your own resting rate decrease as you train, but it isn't really comparable with anyone else. Your max heart rate is mostly unrelated to fitness and varies a lot from person to person, but will generally decrease as you get older.
For me, the highest I have ever recorded is 185 and I haven't topped 183 in the last 2 years. I generally sustain high 170s over 5-10km and around the 172 mark over a half. But I run with a friend who is about 10 years older than me and routinely sustains 185 over a 10km and has recorded a max of over 200.
I find that there are three things I watch for to see if my fitness is improving. Firstly, as I get fitter I can run at a set pace with a lower heart rate. Secondly, I can run faster at a set heart rate. Thirdly, the amount of time it takes for my heart rate to return to resting after a run decreases. For me, these are better indicators of fitness than just using heart rate measurements alone.