While it seems unlikely to be getting PlayStation rumors from a Nintendo site, Go Nintendo has a rumor roundup from the Japanese gaming magazine Game Lab, which drops the hint that Sony might be working on a pressure and touch sensitive mat to coincide with Afrika's eventual release.
We're not sure what happened to Afrika after it was shown off at last year's Sony presentation at TGS, but it managed to disappear faster than some endangered species. If they are working on a peripheral that facilitates some sort of innovative gameplay it could explain the long delay, but with no details out we have no idea how the game would actually work. Stomp your feet to cause a stampede? Run like a gazelle to escape the lions? Hopefully we'll know more soon, probably right before the game is released in 2012.