There is...i remember it being on netnuke or psgaming.net or something, check there. Im pretty sure its called Spambot, and the way it works is there is a .txt with the channels you want and a .txt with the message you send and all you need is a cd key for diablo or LoD.
its been down cuz i havent been running the bot cuz no one ever joined. ill start the mod again and if u guys tell ppl its up it will begin to be like op cowage was or something. until i get a spambot only expect a few people in there
AutoIT is idiot proof, and there are lots of tuts, would be real easy to make a spam bot to your seeing, but to make it custom and read from a file and such, i could see problems there.
You should just tell sum frendz over d2 to tell thier friends to tell thier frends & so on... then i think u would probably get sum traffic in that channel