interest is heating up for HP's ultra-thin, 'Entertainment Notebook PCs,' such as the 3.8-lb., 12.1-inch Pavilion dv2. Along with the slightly larger Pavilion dv3, the dv2 represents HP's assault on the ultra-thin notebook category popularized by Apple. But with a retail price of about $700, this slim system built on AMD's Athlon Neo platform is a lot more affordable than Apple's MacBook Air.