I've been learning Japanese for a month, and in that time I've found lots of great resourses, i hope you find some of these helpful...
* http://www.guidetojapanese.org/
EXCELLENT guide to Japanese Grammar. Essential Reading and very easy to follow.
* http://kanji.koohii.com/
and: http://forum.koohii.com/viewforum.php?id=10
The site to study Kanji with the Heisig method (you will need his book, but if you want to give it a go, they have the first few hundred pages up there for you to try.
The second link is for collaborative projects that people have worked on, inputting sentences and vocabulary from many grammar sites, that can be used as Anki decks.
* http://ichi2.net/anki/
The best flash card program around. Uses SRS. You can enter sentences you learn from anywhere, and it will take care of your learning process, no need for memorization.
* http://smart.fm/home
Brilliant site. Check out the core 2000 & core 6000 (6000 most used words in Japanese newspapers.) Make your own lists of words and sentences you want to learn. And you can download any list you make into Anki (find the Smart.fm importer plugin on the anki site)
* http://www.alljapaneseallthetime.com/blog/all-japanese-all-the-time-ajatt-how-to-learn-japanese-on-your-own-having-fun-and-to-fluency
Good site that teaches you how to learn with the "sentence method" to fluency. Excellent motivational site too, make you beleive you can really do it.
* http://how-to-learn-any-language.com/forum/forum_posts.asp?TID=6241&PN=1&TPN=1
Big list of audiobooks with transcripts.
* http://radiotime.com/genre/c_349/Japanese_Talk.aspx
List of radio stations in Japanese you can listen to online.
* http://music.goo.ne.jp/genre/japanese.html
Find out about Japanese music here by genre, then search them on Youtube. Or, find a song you like on youtube, then learn the lyrics to it on here.
* http://www.polarcloud.com/rikaichan/
INDESPENSIBLE. a dictionary that pops up kanji kana and english meaning when you hover over a japanese word. Saves about a billion years from going around translating every word in a normal dictionary.
* http://www.d-addicts.com
http://www.dramacrazy.net/
http://www.animecrazy.net/
d-addicts for download of shows, or the other two for streaming. Although the shows have english subtitles on the streaming sites, its still a great way to learn new words if you make the effort. Plus, is you choose a series that's not yet finished, you can watch the raw version, then the subbed version comes out later, so you can find out how much you really understood.
gl!
I'm a big fan of D-addicts and used it a lot when I was living in the States so I could get my weekly J-drama fix