After watching "Clone Wars" I knew I couldn't rest until my Obi-Wan's leg articulation was fixed. So I went to Wal-Mart, picked up a basic Clone, and boiled and popped my way to a super-articulated Obi-Wan!
I also switched the hands, giving Kenobi the hinged wrists that are just too cool to pass up.
If you attempt this, you'll need to snip a bit off the stem of the hand; the pegs of the Clone's are a bit longer than Kenobi's. Also, you'll have to cut away a bit at the peg that goes into the hip. Compare Obi-Wan's leg to the Clone's once you pop it out and you'll see it's smaller. A little on each side should do the trick.