Eighty nine pages later, I have finally come up with a pattern for the Ron Weasley Blanket. I put a tremendous number of photos into it to make it a decent attempt at explaining how to make it and I'm afraid the pattern is quite lengthy.
Here is a link to check out the monstrosity that is The Ron Weasley Blanket Pattern.
I've never written a pattern before so I'm sure it's got errors but I figured I'd have a go at it since no one has come up with a detailed pattern for this popular project yet.
If anyone does decide to use this pattern, I would love to see pictures!