Well, I got a silicone roll-up keyboard to use with my N810. It's definitely going to take some getting used to, but it's perfectly usable -- and, more importantly, it's a hell of a lot faster than typing on the built-in keyboard.
I'm typing this post with it (*gasp*), and the annoyance factor is manageable.
On the minus side... using this stuff, whether together or separately, makes me feel so freaking Asian it's unbelievable.
Responsiveness is good; certainly not as good as using a real keyboard on a real computer, but good enough for occasional blogging and web surfing. Typos and missed keys are much more common than I'd like, but... meh.
In the end, I think this is the best compromise... usable enough, but not *fun* to use, so I won't be tempted to fall back into old patterns of behavior.
Hopefully this will mark the end of the geeky test posts for a while.