This is a quickie concept. A while back I had an idea for a multi-touch keyboard. It was an interesting idea and I’m sure at some point it will become reality. However we’re a software company not a hardware player. What could we do in software using existing hardware?
What if you took the essence of that idea and made it as a complimentary tool to your existing keyboards:

The basic idea is that the device connects back to your computer and acts like a secondary display. This would be application sensitive so in PhotoShop you see visual tools on your secondary display and in Word you get editing tools.
Tags: Concept, Display, Iphone, Keyboard, Multi-touch

Saw something similar using the iPhone as a kind of “inventory”/”spells”-pannel in games. Extending that would be pretty cool. Also saw “AJAX Remote Buddy” (from a company called IOSprint) which can be tailored to just about anything.
As a happy iPhone owner, I would be delighted to see more apps/games support this in some for mor another.
Cool if you’re going to have an iPhone anyway. Even better, a dedicated LCD keypad, like having just the left-most keypad from an Optimus Maximus (and a lot cheaper http://www.artlebedev.com/everything/optimus/), so you get tactile feedback and don’t have to hassle with plugging it in each time you use it.