The colors of the basketball jersey for Ted's team of architects is based on the Cleveland Cavaliers, the team of Ted's hometown in Ohio.
Lily mentions a made-up history about Robin, Nick and a foreign student called Nadia. In the movie American Pie, which Alyson Hannigan was part of, the character played by Shannon Elizabeth is named Nadia and is a foreign student.
The Splitsville restaurant is decorated with yellow roses, a flower representing friendship.
In the opening sequence, Barney drops the same piece of Chinese food numerous times. Lily and Ted both eat pieces. But throughout the whole scene, even after the opening credits, Barney never actually eats a single piece.
In this episode Marshall is on a basketball team. In season 4, episode 14, The Possimpible, Marshall states he can no longer play basketball due to an injury, which turns out to be called dancers hip so it could be likely that in this episode he lied about his injury.