I'm glad to see this post pop-up again - it is good reference.
I also use these simple lashings/jam knots; they are easily untied - 'not knots'.
1) Hennessey lashing: http://hennessyhammock.com/media/C37/#content
2) Jam knots: http://www.youtube.com/watch?v=p4dMv6BtEPw
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