This is another instance of Barney not wearing a suit as he doesn't suit up for Mark's funeral
The Colts went on to beat the Bears 29-17 in Super Bowl XLI
Emmitt Smith actually won Dancing With The Stars
The patch on Barney's sweatshirt is a brand logo for the EVER clothing company; this logo appears several times through the series.
Despite the Super Bowl being a plot this episode actually aired the day after Super Bowl XLI.