Wow.  Lots of good information.
I'm not out cutting down a forest or using firewood for home heating.  Just whenever a tree falls, I drag it out & cut it up.  My wife actually enjoys splitting wood and I think it's good exercise occasionally as well.  So I cut up the occasional tree, split & stack the wood, and just let it accumulate.  A little goes for small fires on the property or to keep the burn barrels going for a long time, but otherwise I'm cutting trees just because they are there.  I even tried giving some away a few times but apparently people who burn wood in their homes only want hard woods - even if it's already split, dry, and free.
I use a chainsaw maybe few hrs every other month and am not relying on it to make a living or provide heating fuel.  So with that light use, I kind of like the dremel tool attachment idea as a starting point.  That looks like the fastest and simplest for a novice like me and i already have a couple dremel tools lying about.
If Oregon makes several grades of chain, how do I know if I'm getting a long-lasting one?  Is what they sell in Lowe's/HD good or the crappy version?