The Mall of America is using Twitter to tweet about parking lot information. This would be useful for last minute shoppers buying Christmas presents. And as you are all aware, this year will be huge for Christmas spending. This past Cyber Monday, consumers spent about $595 million just online. The Mall of America Twitter account has about 1,900 followers and was launched on December 19. The Mall of America sends out tweets at about one per hour from 9:30AM-5:30PM up until January 1.