Apple has announced that a special event for the launch of the iPhone OS 4.0 will be held on April 8. We don’t know right now exactly what new features the update will add, but one of the big ones expected is multitasking.

Three versions of the iPhone OS 4.0 are turning up in stats collected by PixelCUBE Studios. The company has recorded entries for OS 4.0, 4.0.1, and 4.1.

Cypress has unveiled a new iPhone and iPod touch dev kit for making hardware accessories. The kit is designed to let manufacturers create new devices like speaker docks and other gear quickly and easily. The dev kit is available for about $250.