I'm currently taking a class on Interaction Design Methods (IAT333) and we just finished our midterm portfolio at http://team100percent.wordpress.com.
We're currently researching a prenatal yoga group as our interaction research participants.
We have launched cultural probes, and through analysis of these probes, created personas and foundation sheets. Exploring these personas, our team developed informances and journey frameworks to try and understand possible problems that exist in our participant's lives.
Our current problem definition is about reducing back pain and improving mobility for these pregnant (and also post-partum!) soon-to-be mothers.
Our team had some fun especially with convincing one of our team to pretend to be pregnant and act out a scenario :D