Yesterday I got an ipod touch, which I've been wanting for a while. It looked like a great handheld device to use for reference, study, and games. After having it for a day, I'm now even more glad I decided to go for the touch instead of an iphone, because using it for flashcards/study is apparently a huge drain on the battery. I think if this stuff was on my phone, I might feel hesitant about using it a lot for fear of using up the battery or missing calls.
I got this dictionary: http://www.codefromtokyo.com/japanese
There's a good flashcard feature not mentioned on the internet site. It reduces the frequency of the cards you know, gives you the ones you don't know more often, throws in old words once in a while and brings them back into heavy rotation if you don't get them right. And you can create your own vocabulary lists (for example, "Versailles blogs" XD) to be tested with the same progressive card system. I've been playing with the JLPT lists tonight and it looks like a really good study tool. Wish I'd had this years ago!
BTW, I'm going through my music collection and re-rating a bunch of stuff, and I rediscovered Kamijo in an unexpected place. That's him doing the backing vocals in the chorus of Metis Gretel's "Kyuuen no inochi," right? Well, I'm sure it is because his voice is unmistakable, I just don't recall him mentioning it anywhere so I was surprised.