Yes, please add kanji to the system. I'm learning Japanese and use SRS's for kanji memorization, along with Heisig's Remembering the Kanji (http://en.wikipedia.org/wiki/Remembering_the_Kanji). While Anki (http://ichi2.net/anki/) works wonderfully on my Gentoo system, a web-based option would be nice as well. However, beware of lag; that was one of the big drawbacks of Khatzumemo (http://www.alljapaneseallthetime.com/khatzumemo/), which was otherwise quite well-designed, IIRC.