I feel like I’ve been posting a lot of mobile-related posts on Keefr.com lately—maybe because they’re becoming more and more commonplace— a must for most web sites to have a scaled down presentation for devices not tied to a desktop, or a laptop for that matter. It could also be related to the fact that professionally, I’m being involved in more and more mobile-related projects. Then again, that could be related to the first point. Ahhh! Vicious cycle!
Anyway, Smashing Magazine does a fine job laying out and explaining guidelines to make the most out of your mobile UX.