In Canada, I've personally never seen an ad for it specifically for Blu-Ray--closest would be that "Ladies and Gentlemen" ad, which showed games, Blu-Ray, Home (yeah), etc.
With regard to how much advertising it gets, I'd say I see just slightly fewer PS3 commercials than 360 ones, and more than I do for Wii. I never saw a Metal Gear Solid ad, but I've seen plenty for the Call of Duty games, Uncharted, Assassin's Creed, LBP, and especially Motorstorm 2 right now.