There is still no change in the first pot of dioscorea elephantipes (4 seeds remaining in there). No signs of growth.
The seed I had moved to a moist ziploc was nice and plump. No sign of roots or anything yet. I did move it to a pot with Miracle-Gro Seed Starter mix. I am keeping the pot inside a ziploc bag to maintain the moisture and humidity, at least until I see some sign of activity. I am trying to refrain from digging around them to see if there are any roots yet.
Patience is not a virtue of mine. =)