Thanks! I actually spent a long while trying to come up with something unique that wasn't too cheesy. I'm pretty happy with how it turned out. I probably should have color corrected the transition (since it came from the 2004 DVD) and added a second or two of slug at the end, but other than that I'm pretty happy with it.
I have no idea what their sales are like, but the Holiday Special is one of their highest-rated riffs according to their site, so I have to assume it's a good seller. I'm sure all their riffs of the Star Wars/Star Trek/Harry Potter/LOTR franchises are big sellers. I purchased all the Star Wars riffs even though I still have yet to watch TPM or ROTJ. Having never seen Transformers 2 previously, I bought that riff and watched it that way for the first time, which was awesome. I may do one of the Twilight movies next. :p