Though not on Blizzard.com at the moment, WorthPlaying has the official announcement of The Frozen Throne, the first expansion pack for Warcraft 3 (as first mentioned in this story). Due out this summer for $35, here's what will be included

- One new Hero per race, each possessing powerful spells and magical abilities specifically designed to enhance each race - A host of new units, each equipped with new abilities and spells, giving players the opportunity to create diverse strategic and tactical forms of combat - 3 new tilesets featuring extraordinary new lands to explore, complete with numerous creeps and critters to wage war upon - Player-built shops, unique for each race, equipped with items carefully designed to improve and aid the units of every race - Neutral buildings, which will provide players with numerous new upgrades, items and abilities - Neutral Heroes, available for recruitment by all players, that can supplement and strengthen a player's army with all new spells and abilities - An advanced world editor that allows players to create their own custom campaigns, complete with cut-scenes and voiceovers - Many new multiplayer maps - Expanded multiplayer options over Battle.net® including multiple new game types, clan and tournament support