Thanks to everyone who replied to my earlier questions. I will be testing the siege strategies (ladders vs towers vs saps) against the Greek cities. First an update, then some questions:

Spain helped me out by bribing the last Gaul settlement and ending the faction. Fortunately, I was less than a turn away. It rebelled and I was able to take it before they did. It is the region right in the middle of Spain, which will come into play in my question. I stayed there a turn or two to regroup and establish a garrison before furthering my plan to attack Spain and take all the peninsula. Then - Germany attacks me, in Gaul, where I am weak. Ahh the best laid plans... I was only able to post a close victory by outrunning them. It is a fun little story: One of my kids acquired the nickname Decius the Mad due to his being a "hypochondriac" and "dangerously mad". As all his traits are essentially in the negative, I was using him to tour the empire and build forts and watchtowers where appropriate. He just happened to be nearby as I noticed the Germans crossing the border. I expired his movement by moving him to the outskirts of Alesia. Fortunately they attacked him (instead of the town) and the weak garrison were reinforcements. The garrison got trounced but he was able to run around for twenty minutes to secure the victory (COWARD!!). They didn't attack again that turn and he was able to buy some mercs before heading into town.

Needless to say, my two armies in Spain pulled out to head for the German border. I landed three armies in Greece and have simultaneously laid siege to Sparta, Corinth, and Athens. I am going to attack rather than wait it out, as they have small garrisons and I need the money. It'll be a fun turn tonight - probably take an hour or more!

So my newest questions:

1. After I took the rebel settlement in Spain, Numidia offered alliance and I took it. It seemed like a good thing as they surround me in N Africa and have a border with Egypt. They are at war with Spain and I'm assuming they saw me take the rebel region in the middle. I'd like to strengthen the alliance as I'd like to steer them towards Egypt and away from me in Carthage. The region isn't worth much to me so I'm thinking of gifting it to them. Obviously they will lose it to rebels and then to Spain before they can garrison it. Will I lose any diplomatic ground if I gift it to them knowing full well that they will lose it anyway? Or is it not my problem after I gift it and I get the benefits of doing a nice thing for my ally? I can't afford to leave a gov or a dip there so there is a good chance it would be bribed away by Spain anyway. Any thoughts?

2. No one - even far away civs like Scythia and Pontus - will buy my map info. If I leave negotiations open or offer to trade map for map they respond that they have nothing to offer. Any ideas?