Fantastic toolbox, have been using it for spatial data analysis, and have been very happy with it!
One comment following up on Johannes Traugott below: ge_point (as well as ge_point_new) allow passing on a description for each object, which is then displayed in a pop-up balloon. Passing on the description to multiple objects seems to work fine. However, only a subset of objects (apparently random) actually displays a balloon. I have small (~10 KB) kml files with only about 20-50 objects, so it doesn't seem like size issue. Have you encountered this before?
Either way, great work!