Color Game Boy Depot: System FAQ, links, and a few reviews.
Game Boy Color Fan: News, reviews, previews, and release dates.
GameBoy Weekly: News analysis, previews, and links.
Geezer: Closed site offering game reviews, cheats, passwords and hi-scores.
Suite101.com: Reviews, previews and news.
The World of Game Boy Color: Information, reviews, previews, and cheats.
Zach's Game Boy Page: Reviews and cheats.