the old lessons are tagged as you said. vocab, etc. and low level lessons just have romaji. at that time we didn't have a premium feed or premium-only files.
but now we do. at least for the last few months.
on the current lessons, there are now dialog-only tracks (and for newbie and beginner season 2) there are review tracks. those include kanji, kana, romaji and english.
eventually, we'll go back and do the re-tag the old lessons the same way. but with something like 500-600 old lessons and only 4 full-time people, it's no easy task. so for the time being only the current lessons are being tagged this way.
btw - i noticed the other day that the tags cannot be viewed from an iPod Touch. not sure why that's the case, and we're looking into it. but you CAN access the learning center via iPod Touch, so the entire transcript can be read that way.