My friend and I are currently powering our way through one, including CR 54, CR 67, and NSNA. We're a little over halfway done. It's a different approach, as we formulated an alternate order to watch them in (mostly based on the order of the books), and during some down time at work I created a workbook/scorecard related to each film. It has made it a lot of fun and really makes you watch the movies in a different light.
If anyone is interested in looking at the PDF of our workbook, you can do so here: http://pdfcast.org/pdf/the-quest-1
If you would like to see our personal scores, as well as a cheat sheet on the scorecard, check out my blog post here: http://pdnordgren.tumblr.com/thequest
My blog is very much a work in progress at this point (I have not promoted it or shared the link yet, as I want to build a few more foundation posts/pages), but it's coming along nicely. The movie marathon post is updated, though.