I have been calling this The Year of Desktop Linux ever since Vista reared it's ugly head. It's now October, and while a couple of very fine Linux distros have appeared, it's not a "surge". According to Market Share, a site that tracks browser and OS penetration and trends, Linux use has double this year, but it's still only .81% of September's market. Even Windows 98 is .89%. Meanwhile, Mac OS is only a few hairs higher than Windows 2000.
Market Share is presented by Net Applications. From their web site:
Since 1999, Net Applications has been a leading source of applications for webmasters and eMarketers. Headquartered in Aliso Viejo, California, Net Applications distributes its services through over 7,000 partners and affiliates.
[Update 10/16/07] Dell reports that after four months desktop Linux accounts for about 1% of their total desktop sales. Conversely, server Linux soars.