#118: postgis ST_Intersects fails with invalid multipolygons

Solved!
But it fails silently, often only intersecting with one of the constituent polygons if the polgyon as a whole is invalid.

#41: installing mapnik in OS X with MacPorts

Solved!
Mapnik is an open source map rendering lib that makes pretty maps and has an extensive Python API. Unfortunately, it's still a pain in the ass to install with macports. Luckily, there are some really helpful people in the community....