Good news for guitarists! One of the most popular Universal amp/effects apps has added support for the Griffin Stompbox footswitch controller. That looks like a seriously nice deal; a full controller for about what you'd pay for a single hardware pedal. The update also adds a whole bunch of other new features:

• Tone sharing to share and download artist and user presets
• Griffin Technology StompBox support
• 64 slot preset manager
• New added Octave and Cry Wah effect
• New bass expansion package
• New boutique expansion package
• Ultra low latency, 50% improvement
• Phrase Sampler added undo support
• Continuous speed adjust in iTunes JAM player

They've also put the app on sale, at 50% off, so you can save $10 to spend on some In-App Purchases.

Buy JamUp Lite on iTunes: Free

Buy JamUp Pro on iTunes: $9.99 (On Sale, from $19.99)

Here's a product demo from Griffin for the Stompbox. I'm really tempted to get the pair to run synths through the effects.