Michaels is supposed to be running the Warm Up America / Warm Up Canada campaigns year-round. The Canadian stores used to do Blankets For Canada, but recently changed, so if you're in Canada, check with your store to see what size motifs they're taking (B4C took 8" squares, WUC is asking for 7x9" rectangles).
Though, I'm someone who works at Michaels and who ran the B4C program quite successfully all last year, and even I don't know what we're doing now, so expect that the store associates might not know what you're talking about.
ETA: there was an idea kicking around a while back about the crochet board challenging the knitting board to see who could make the most squares. I still think that would be cool. ^_^
That would be a great challenge