I've done one of the KDMC fellowships and it was phenomenal. Go for it!
The Knight Digital Media Center at UC Berkeley J-School is hosting a training session/fellowship on data journalism aimed at unpacking the 2010 Census. The training is in December; the deadline to apply is November 7th.
Data Visualization is a growing piece of the journalism innovation pie , another possible skill that can enhance your audio storytelling.
One of the trainers, the wonderful Jerry Monti, has written about data journalism here: http://bit.ly/aTBsUb
More information about the workshop and links to applications are here: http://multimedia.journalism.berkeley.edu/workshops/39/
BTW, One of the presenters at this session is from public media. It's Dante Chinni, the award-winning creator of Patchwork Nation, a project now affiliated with PBS Newshour.