I don't know how popular GIS software is among users, but I for one, find them tremendously useful.
I would love to see Quantum GIS (http://qgis.sf.net/) in an RPM format. The current versions is 0.2, and I have yet to find an RPM for Mandrake (there is a SuSE one I believe). The use for this is probably towards academians or people seriously using GIS in another field.
Another application on the same lines is GRASS (http://grass.baylor.edu//), a complete GIS package first developed by the US Military. It is GPL'ed and has an installer (.sh script), but still, an RPM would be nice. There is one for the stable version (5.0) but the current development version is 5.7 if I recall well. The interesting thing is, GRASS is text-based, while QGIS (see above) has created a plugin to introduce a GUI to the application that is much more professional and efficient.
These are the RPMs I am looking for around the internet and could not find yet. If you would be so kind to create them, I would be grateful.