After a bit of web research, I found that there are two main ways of making a rope hammock--basically a net that you lay in. The first way is to have multiple pairs of cords running the width of the hammock, then knotting alternating pairs of cords to form the mesh. This seemed to be an easier concept, and perhaps easier to execute; however, very few of the hammocks I saw were knotted this way and I wondered why, if it seemed so easy.
The second way is to use one continuous cord (or several shorter cords knotted together) and...sew...the hammock. (The PDF I used to learn this technique can be found at the new URL of http://blogs.cornell.edu/garden/files/2009/04/technique4.pdf.)
This is the way I chose to go for a few reasons. First, it would be a challenge to learn a new knotting technique. Second, it seemed like a nifty skill to have. I can see it now...
Friend: "Here we are on our week long camping trip and I forgot my net! I wish I knew someone who could make a fishing net."
Me: "Have no fear! I can whip one up in no time at all. I just need to strip the inner bark fibers of that tree over there, twist them in to rope, and it'll be done in a jiffy!"
So here are a few pics of the hammock in progress. I figure I need about 30-40 more Meijer bags to get the job done. (So get shopping, Kara!) ;) Why am I insisting on using only Meijer bags? It's probably an OCD thing, but I don't want to have brown bags mixed in with the white ones. Or black Wal-Mart lettering mixed in with the red and white Meijer lettering. So it's purely cosmetic. However, if I had my way, I'd use 100% Target bags. They're larger (so I could use fewer), and they're a bit more rubbery than the regular plasticky grocery bags (so they'll be a bit more flexible, I think).