I checked out the free flash card tool from BYKI the other day. It’s good for memorization practice. The speakers have good pronunciation, though I wish the cards were written in Japanese in hiragana / katakana, rather than romaji. I just think you can’t learn Japanese by learning with romaji. A Western beginner needs to get used to how Japanese characters look and sound. One step that really helps is to start thinking in かな, not romaji.
Anyway, BYKI also has a “deluxe” version ($40) that seems cool, claiming to offer voice pronunciation coaching, mobile versions, etc… – I haven’t checked it out.
Using this tool reminds me of some Japanese learning pages – many of which I found through SF’s Soko Gakuen. E.g., manythings.org and this Swedish site. Ok – I know I’ll be back soon to revise this post with a more authoritative list of cool learning sites.