http://japanese.about.com/ seems like a good site. I haven't used much of it yet but I've found the Kana sections very good (found under the "writing" tab). I'm sure it has a lot of other good information as well, I just haven't gotten to it yet.
One thing that I liked about it for it's Kana sections is it gives the stroke order and it seems to always give handwritten over printed versions (think き where you can have the third and fourth stroke connected when printed). Still though, it's not perfect and I haven't found a better set of lessons than the Kanatan Kana series. But unfortunately not everyone is a paid member (I'm not, at least not yet) and you have to make due with other material.
Some other sites that I have bookmarked but not had a chance to go over yet are:
http://www.learn-japanese.info/
http://www.learnjapanesefree.com/
http://www.studyjapanese.org/
http://www.freejapaneselessons.com/
http://www.coscom.co.jp/learnjapanese.html
Like I said, I haven't looked through much of these sites and I'm still very early in learning Japanese so they may or may not be very useful.
And finally, another site that you might find useful is
http://www.livemocha.com/
This site is not great for teaching you the language in my opinion but once you've got your Kana down and are learning your grammar/Kanji, it can be useful for vocabulary practice. It is also great because you can get writing and speaking help from other members and it's good for meeting people.