KS - Nipple chaffing suggests his running top isn't a great for him. I've had it with cheap tops when I first started running, but only ever suffer it now if I get really soaked on a long run. I've found Brooks tops to be really good.
Vaseline would help prevent it, or the good old advice from the Paris race pack of 'bandages for your tits'!
Dannirr - That's interesting. I found personally I need to bank those long runs fairly regularly to maintain any sort of stamina over the longer distances, so I was interested to see how you'd get one with regular running but not going too long on any of your runs. I've found I can wing it on anything up to a half, but beyond that I need to be trained properly.