[caption id="" align="aligncenter" width="500" caption="Real keyboard, connected to iPod Touch via USB through iPod Camera Connector accessory."][/caption]
I want this. Well, maybe with a slimmer keyboard. Possibly a foldable version of something the size of the Apple Wireless Keyboard (pictured below). Doesn't have to actually BE wireless, though. I'd be FINE with a USB cable, and even with slapping rechargeable batteries in the keyboard to prevent an additional power draw from the iPod Touch...
[caption id="attachment_2015" align="aligncenter" width="400" caption="Apple Wireless Keyboard - perfect companion to my iPod Touch? Please?"][/caption]
This would make the Notes app much more useful. And the WordPress app. And email. etc... etc...