It has taken more than two years, but the One Laptop Per Child initiative has finally released its much-anticipated laptop: the OLPC XO-1. The XO-1 costs $200 each to donate, but for a limited time — until Dec. 31, 2007 — people can avail themselves of the "Give One, Get One" promotion to give a $399 donation ($200 of which is tax-deductible). One laptop goes to a disadvantaged child in a developing nation, while OLPC gives you another one as a thank-you gift of sorts. (Think of a PBS pledge drive, where they offer a gift to you of a DVD set for a $200 donation.)