Great spoiler
one hint (which will also go in Rik's spoiler): you can see whether a tech giving a religion has been researched by clicking the tech bar at the top of the screen. This turns it into a selection bar, offering all techs you can research. If the tech has been researched by someone else, the icon looks normal, if it is still unknown and its religion unfounded it has a little icon added. usually, this displays the religion, so it is the religion's icon, but if 'select religion' is on (as it is here) you will see the generic religion icon, two clasped hands or something. You can also mouse over the tech in the tech tree, and the text that appears will either say 'First to discover founds a religion' or not.
As for the map: I wanted to give you guys something to think with the civs, and keep the game within a reasonable balance. Therefore, I tweaked both civs a bit
