1LitreofTears_Sakura
neko_amamori
Fundamentals of Japanese Grammar by Yuki Johnson is FANTASTIC.
Harry Potter in Japanese (able to be purchased from ebay)
Breaking into Japanese Literature
I've also heard that Remembering the Kanji is a really good resource, but I haven't gotten my copy yet to verify that.
Pokemon in Japanese for the DS is also reallyreally good. I got my copy of Heart-gold and am loving it. It's easy to read, but it really boosts your confidence.
Wouldn't it be hard for a lower-intermediate Japanese learner to read Harry Potter in Japanese?
I's still technically a lower-intermediate Japanese learner. It's a hard read, but it really is helping my Japanese and it's a story I already know, so that helps. It's also a challenge, but not impossible, which is something I enjoy.