This is why we had deputies back in the Civ3 demogame... Anyway, back in the demogame, I'll be posting pictures soon.
A short summary -
We founded our 3rd city, and connected the copper. As expected, the 3rd city pushed us to -5gpt (more maintanence), and now we're at 80% science. (The game simply forbids going below 0 with max science, unlike Civ3), but we did get Writing.
Just to note to kick the old Civ3 habit -
Open Borders are completely safe in Civ4. Not only can the AI *NOT* declare war on you and be in your territory, their units will move to the edge of the territory before attacking. Also, open borders are needed for trade. Denying open borders does give us a rep hit (although a minor one).