InfoWorld amassed 210,000 signatures for a “Save Windows XP” petition, and forwarded it to CEO Steve Ballmer. Today is the date when Microsoft officially ends the availability of its last generation Operating System, and hopes that everybody gravitates to its current OS, Vista. It’s unlikely that Microsoft is going to change its corporate mind at this point, but the petition points out a glaring irony: A Microsoft OS is immensely popular, and has the kind of rabid support usually reserved for the little penguin,