qgis - Find and list all polygons that overlap with another polygon

I am working with two polygon layers which overlap but are unrelated (one is congressional district boundaries, the other is MPO area boundaries).

I would like to generate a list of all the polygons in one layer which overlap with each polygon in the second layer. I.e. I want to generate a list of all the Congressional districts which are at least partially within each MPO area.

Which vector tools or plugins can I use to get there?

I'm using QGIS 1.8 on OSX 10.6.