Very interesting thread....
From my own personal experinces with friends/neighbors on this subject has taught me that how the split goes depends on the circumstances as many of the previous posts elude to.
Here are two examples:
Back when I first bought my place and couldn't spare the time to cut/split firewood for sale (as I do now) due to trying to clean up old fence rows, leaning trees into fields, and in general making the place more suitable for farming, it was less work for me to cut the offending trees down, limb them up and drag them near the driveway where a friend from work would come with his truck/trailer and cut up the trees into rounds and take them back to his place to be split. So, I did the work of getting the trees down and ready for him to make firewood out of as it was less work than cutting them completely up and throwing them in the burn pile just to get rid of them. Basically, he got free wood, I got the tree out of the field, and it was a reduced work load for both of us.
Another situation involved me having to widen out the road leading into my place which is by easement across one neighbors land that is immediately bordered by another neighbor. Luckily, both neighbors are "good folk" so there was no problem in making the changes as long as I paid for the dozer/hoe work and the new gravel on the road. On the one neigbors property that has the property line running right next to the access road there was a steep bank (almost a cliff) with an old fence and about 20 trees on it that would need to go to make the improvements. So, the deal was that I would cut the trees, limb them up, and pull them up near his house so he could cut the wood for his 85 year old father's wood stove. So, everyone was happy with the outcome: Both myself and the neighbor who owns the land I have an easement through got an upgraded access road and the other neighbor whose property line borders the road got firewood (with reduced work for him) and a landscaped, seeded, gently inclined bank with grass that he can now mow and upkeep as he sees fit.
So, again, the circumstances between the parties involved (both past and current) should dictate the split, at least in my opinion.