Very interesting review of Knizia's Blue Moon at the Games Journal:

Blue Moon effectively offers a game with the versatility of Magic, but with the wallet-crunching collectibility of those games tempered somewhat. While there has been considerable overlap between the worlds of board gamers and collectible card game (CCG) players, it is probably fair to say that there is a certain amount of antipathy towards trading card games from many players of 'German-style' games. The apparent rule that the CCG player who buys the most wins the most, and the need to purchase and trade to explore certain strategies or tactics, can seem bizarre. While I would argue that there are also many good points to such games, the clear influence of collectible card games on Blue Moon will add an interesting element to the debate, as this non-collectible game comes not just from the workshop of one of the most prolific of board game designers, but a man who is on record as a skeptic of the CCG format for games.