GameFAQs: Release data, cheats, and a message board.
GameSpot: Reviews, news, previews, images, videos, cheats, links, and a forum.
GameSpy: Review, previews, screenshots, and movies.
GameZone: Preview, by Louis Bedigian: "Gradius Collection is the perfect way to break into the series." [Score: 8 out of 10]
IGN: Reviews, previews, news, screenshots, videos, and a message board.