From time to time I've found myself on About.com's Japanese site. Perhaps I hadn't seen everything there, however, because today i stumbled across Namiko Abe's Japanese blog lessons. Each blog entry is written in both Japanese and English, which seems like a good resource.

http://japanese.about.com/od/namikosblog...essons.htm

Very nice. I clicked on a link for particles "Ga vs. Wa" and there were detailed explanations with many example sentences.