I'm a shitty typist, but a really good coder. I've tried to make myself faster, but I think my brain isn't wired for it. Occasionally my typing becomes a productivity bottleneck, but most of the time it just doesn't matter, as I'm spending 90% of my time figuring out what to type anyway.
Try a new keyboard. If you have a standard keyboard, get an ergonomic one. If you have an ergonomic keyboard, get a standard one. A few years ago, I found that using my laptop more frequently made me a better typist because I hadn't developed such bad habits and compressed layout drove my hands closer to the home row. Tape a piece of paper over the home/end/arrows/keypad/etc if you can't keep your fingers from wandering.
I think a standard laptop is pretty much the most ergonomic possible layout. The too-big keyboard is one bad thing about the standard layout and the mouse on the side is the other.
My wrists disagree vigorously with you, sir, on that. Standard laptops have terrible ergonomics not only related to key spacing issues (frequently too tight) but also the abruptness with which the keys stop (being as it is almost entirely rigid instead of the progressive resistance a good, say, Model M has).
