Alex Tew, a 21-year-old student from a small town in England, has earned <A HREF="http://today.reuters.com/news/newsarticle.aspx?type=internetNews&storyid=2005-12-29T184859Z_01_KWA957738_RTRUKOC_0_US-HOMEPAGE-1.xml">a million dollars in four months</A> on the Internet. All he sells are pixels, the tiny dots on the screen that appear when you call up his home page. A 10-by-10 dot square, roughly the size of a letter of type, costs $100. Tew's home page now looks like an online Times Square, festooned with a multi-colored confetti of ads.