Well, I've got line graphing implemented, and it is looking pretty nice. I'd like to not just graph, but also take graphs and generate an estimated results of future workouts based on current trends. This will probably have to wait until a 2.0 or 3.0 release. I've been slightly busy with other things, but I try to spend a few hours on this a week. I wish there was a lot more time in the day.
After getting all of the graphing views working correctly, I've really gotta work on the interface and some other things, but otherwise I am pretty happy with my progress.