Thanks guys for your comments all encoraging... although encoraging me to go cold turky... well so far i've been up for 4 hours and no smoke yet... but boy am i gagging for one!!
Stick with it, Roadrunner. Take these first few days bit-by-bit.
You
know that the grumpiness is simply your nicotine receptors demanding a fix. If you can rationalise those difficult moments when you feel really cheesed off with the world, that it's only the cravings doing it, and that
you're stronger than them, you'll do fine. Cravings come-and-go during the first few days. They fade over time. Don't think "a fortnight" away just yet, but rest assured you'll be over 99% of the hard work by then.
Andy