WildTangent is a company that started up around ten years ago (they originally made game plugins for Winamp, if you remember that) that's recently gotten a reputation for "bloatware." They've made deals with PC manufacturers like Dell, HP, and Acer to bundle in their software on the harddrive when you buy it. (Most users familiar with PCs find these software bundles more of a nuisance than anything else.) But nevertheless, WildTangent claims up to 20 million users worldwide, and they continue to make deals, the most recent one being with none other than Blizzard. According to a press release on their website [PDF], World of Warcraft's trial downloader will now be included with all installs of WildTangent's ORB software, which means that whenever you buy a new computer from a dealer WildTangent has hooked up with, there'll be a program already installed on your PC that will let you download and play World of Warcraft, among the many other games WildTangent has already included.
This likely isn't targeted at you, dear audience -- odds are that you've already got the discs for WoW, and if you do buy a new PC, you'll probably still delete WildTangent's app and install WoW yourself. Instead, it's a stab at picking up new subscribers -- people who might not already know about World of Warcraft or PCs may see the icon on their new desktop, double click it, and find Azeroth for the first time. The press release even notes that WoW subscribers still in their trial month are counted as subscribers, so odds are this is a random attempt to pick up a few more subscribers from people who aren't willing to go get the game themselves.
There's one more thing to note here: Activision isn't mentioned at all.