Master for Webs

Amazon.com www.amazon.com

For time-strapped last-minute holiday shoppers, the promise of mobile buying is seductive: You can shop from anywhere -- whether it be the doctor's waiting room or the line at the ATM. Since Amazon.com is the behemoth of online shopping, I tested their mobile site with a friend's Sanyo cell phone and Sprint PCS service. I didn't have to do finger gymnastics to get to the site: Amazon.com is featured on the Sprint PCS home screen. But when I clicked on the search function, I did have to tap away (three clicks to get to "c") to spell out "cook books." Amazon.com gave me only six choices, three of them CD-ROMs. I