What happened to Guilds?
Guilds are not supported in the final shipping version of Diablo II. During development, it became clear that making Guilds bullet-proof, balanced, and completely secure would have delayed shipping the game. Fundamental, major changes to the Diablo II and Battle.net client/server architecture would have been required, followed by extensive testing and LOTS of game balancing. In the interest of getting the game to our fans, we had to drop Guilds.