Because going to WePC.com and participating there will help ASUS and Intel know what you want with their next netbook. According to the site:
ASUS and Intel have created WePC.com, a place where users like you come together to share ideas, images and inspiration about your ideal PC. But what if it’s not just talk. Your designs, feature ideas and community feedback will be evaluated by ASUS and could influence the blueprint for an actual notebook PC built by ASUS with Intel inside.
Looks really interesting, and I will definitely try it out.