I just tried updating the iPhone's firmware, and things went haywire.
iTunes informed the update had failed and linked me to iOS: Resolving update and restore alert messages.
The iPhone is stuck on the image from the top of that page.
I held down the sleep and home buttons until it turned off and turned it back on, and then went through the iPhone's 'restore' mode.
It then error'd again and I'm stuck back with the logos on the iPhone.
How do I to fix this?