For those of you who might be interested, Michael Marx has a developmental exercises DVD available at Summer Nationals for $25. It contains a bunch of exercises that Michael uses to assess and improve physical and mental skills for fencers - from divisibility of attention to muscular endurance, these exercises are at the core of the Homeschool Physical Education program at NWFC, and are a lot of fun.
If you're at Nationals, they are available at the Marx Enterprises booth. If not, feel free to PM me and I'll try to figure something out. They may be available through traditional vendors such as f.net or Absolute at some point, but I'm not privy to the details...obviously if the first run does well, it opens the door for more material.