You may recall the long running Blizzard vs. MDY battle from various reports here on WoW Insider. In short, Blizzard sued MDY, the makers of the MMOGlider bot (formerly the WOWGlider bot), claiming that the bot violated Blizzard copyright by writing portions of the game to RAM in order to work (since you only have a license to run the game files, and do not actually own them, unauthorized copies are against the EULA). They also claimed that the bot tortiously interfered with Blizzard's customer base. MDY sued them right back, claiming they had every right to sell and distribute their bots.
MDY received a crushing blow yesterday as the court ruled against them, Virtually Blind reports, declaring them guilty of copyright infringement and tortious interference (Apparently, bots stealing your kills is now a legal issue, which is sort of cool). The ramifications of this decision are still being discussed in various corners of the net and legal world.