Attention all shoppers, attention all shoppers of iMac-wannabe PCs, and Dell fans, whoever you are: the Dell XPS One is now available for order, just in time for the holidays. Prices for the 20" all-in-one computer range from the $1,499 of the Core 2 Duo E4500 with 250GB HD and integrated video to the $2,399 of the top-of-the-line with Core 2 Duo E6550, 500GB HD and 256MB ATI Radeon HD 2400 Pro. [Dell]