Does anyone know the font that's used on the system tiles for the planet names?

I don't know the font off the top of my head, but I would point you at ti3wiki.org and boardgamegeek.com . Both of those sites have an active TI3 modding community, so I would imagine someone there knows from having made their own planets. They may even have the font for download somewhere, who knows?

I know some of the guys on ti3wiki.org have the font. Check over there.

Bill