The sticky, adorable World of Goo will be available for iPhone 3GS, 3rd gen iPod Touch and iPhone 4 this Thursday, April 14, for $1. After the first 24 hours, the game's price will expand to $2.99.
As previously mentioned, if you already own World of Goo HD ($4.99) for iPad, the title will receive a "universal app" update on Thursday. This will allow iPad owners to play the game on their iPhone or iPod touch without plopping down any extra goo-dough.
Developer 2D Boy also teases that a "strange new character" appears after the end of the game in the iOS version.