I have just discovered Soduku, and for me, its a wonderful exercise in getting my spatial pathways working again. My neropsychologist says my verbal skills have remained as intact as they are in part because of my habit of playing Scrabble against my computer. I have the assignment of doing 3 Soduku every day. It takes me 28 minutes to solve an easy one!
I'm going to keep doing my homework, though. It would be cool if this actually helped me recontruct some new synapses to replace the ones that got clobbered!