Not all of these sites necessarily link to me, but of those who don't are chosen due to their excellence in relation to anime.
Anipike - the de facto resource for all things anime.
AnimeOnDVD.com - anime DVD release dates and discussion.
AnimeNation - one of the oldest online anime stores around. Wide variety of anime products including DVDs, VHS, CDs, wall scrolls, stickers, toys, and more!