Another film with a lot of buzz at Sundance 2009 is “Paper Heart,” which follows writer/actress Charlyne Yi across the country asking people questions about love (like woman on the street interviews). This mockumentary also has Michael Cera as Charlyne Yi’s boyfriend. It is unclear if they are in a real relationship or not.
Here’s the synopsis for “Paper Heart”:

PAPER HEART follows Charlyne as she embarks on a quest across America to make a documentary about the one subject she doesn’t understand: Love. As she and her friend and director Nicholas Jasenovec, together search for answers and advice, you get the idea that this new generation’s cynicism isn’t the whole story. On their journey, Charlyne talks with an eclectic array of friends and acquaintances, including scientists, bikers, romance novelists, and children. They offer diverse views on modern romance, as well as various answers to the age-old question: does love really exist?

Shortly after filming begins, Charlyne meets a man after own heart, Michael Cera. As their relationship develops on camera, the pursuit to discover the nature of love takes on a new urgency when she risks losing the person closest to her heart. Combining elements of storytelling, reality and fantasy, PAPER HEART brings a fresh perspective to the modern romance and redefines the classic love story.

PAPER HEART was directed by Nicholas Jasenovec and co-written by Nicholas Jasenovec and Charlyne Yi. The film stars Charlyne Yi, Michael Cera, and Jake Johnson as Nicholas Jasenovec.

Director Nicholas Jasenovec talks about Paper Heart

Movie clip from Paper Heart