This has already been discussed a bit around the forums, but I wanted to start a discussion of the different iPhone apps out there and who's using them. Also curious to see who's using an iPhone out there to listen to Jpod or access the website.
After getting an iPhone when they came out here in Finland in July, my iPod has been collecting dust. I listen almost exclusively to Jpod's podcasts on my iPhone going to and from work & while walking the dog, and at the same time I use several different iPhone apps for learning/studying Japanese. I actually wish my morning commute was longer so I'd have more time to listen and study!
So far I've bought/downloaded the following apps: Lingolook Japan Flashcards, Kanji Flip, wwwJDic, MyWords-JP and Japanese Flip. Of these, the Flashcard program is pretty limited in usefulness. Japanese Flip (from the maker of Kanji Flip) is my new favorite, great vocabulary builder. If you haven't tried it yet, I strongly recommend it. Of course MyWords is great, too - it's funny how you can recognize vocab words from various past Jpod lessons. Kanji Flip is good for concentrating just on Kanji. The wwwJDic is an easy way to look up words or Kanji (it's especially fun to draw them with your finger using the Chinese input method); although it requires an internet connection, it's loads pretty fast.
http://japaneseflip.com/index.html
http://kanjiflip.com/index.html
http://www.japanesepod101.com/iphone.php
http://cslmedia.org/iphone/
So, what Japanese apps are you using on your iPhone/iPod touch, and which ones do you like the most?