My brain seems to have become far less spongy since I hit the big 3-Oh. Recently, for my Japanese study I found myself relying on whatever new e-learning scheme happens to be most popular among my cleverer friends. I wrote about some of them here before. But since then I've been trying out iKnow, a learning platform slash SNS that can be used to study almost anything, not just languages. (Note: iKnow is now