iRiffPort is available

 
iRiffPort Digital Audio Guitar Connection Made for iPad, iPhone, and iPod touch is now available.

iRiffPort Highlights

• Turns your iPad, iPhone, and iPod touch into a practice guitar amplifier and effects processor
• Designed for electric guitar and bass
• Integrated 6 foot cable with instant setup
• Digital Audio IO with Low Noise Guitar Preamp
• Core Audio complaint; works with virtually all audio Apps

iRiffPort Connections

• ¼” Instrument Plug Input
• 3.5mm Stereo Headphones Output
• 3.5mm Stereo Line Level Output
• Recessed 30-pin Dock connector

iRiffPort Compatibility

• iPad 2
• iPad 1
• iPhone 4
• iPod touch 4th generation

I've posted the main features here, but for more check http://www.pocketlabworks.com/