Google has made available recent satellite imagery of Tehran from the IKONOS satellite via a Google Earth layer. How recent? Last Thursday. It would have been higher resolution if it had come from the GeoEye-1 satellite, but weather apparently played a factor there.

Brady Forrest compares the maps of Tehran from the various mapping services, with the best maps coming from the services making use of user-generated content — Google (through Mapmaker) and OpenStreetMap. Via All Points Blog.