The Washington Times have shortly reviewed Ubuntu and are recommending it to everybody.
Read the short review here
OK, you say, but you don't have a Linux computer. You do now: Get the appropriate Ubuntu Linux distribution (for PCs, for Macs or for 64-bit processors) free via download or postal mail, sent free when you order online. Pop the CD into your machine. Restart the computer. And, if all goes well, you should be running Linux; the original OS remains undisturbed. Of course, you can also just install Ubuntu over your existing operating system, wiping away the operating system and the data, or you can repartition your hard drive to support both systems.