I have maintained my current Workout Logbook for over 12 months now. Through abbreviations, codes, smiley faces, numbers, tick marks, and other hieroglyphic scratches, I have been able to monitor my progress during this unending journey for peak physical fitness.
In addition to my old school steno book, I just joined a free online data collection site called Beyond the Whiteboard. I entered a few WO performances, and plan on doing so every now and then. I'll probably even flip through my steno and backlog what I can't remember off the top of my head. However, there is almost NO WAY I'll be able to keep this a regular part of my recordkeeping. I just don't follow the CrossFit WODs as regularly as those who created the site. But when I do perform a WO that allows an entry, I'll log it. (Maybe I'll scroll through the posted WOs and pick a few more just for the sake of shaking things up??)
I have also been in contact with Bill P, the creator of Logs It All. It's a similar site. We met through email as part of my casual power study. He's beginning to develop charts, graphs, curves, and studies with all the data he's collected. Pretty impressive stuff out there.