As you know I'm usually against new content, especially buildings, however goods/resources is an exception

Lately I played a SmartMap game and got really big amount of reasources on the map. That made me happy
However, I don't understand why do you propose wood and clay as resources. I'm looking through my office window right now, and I see a lot of wood around

Clay is also very common, so discovering pottery does the trick. If you want to put more resources to the game it is fine, but there are so many of other ones that we don't need to make wood one of them. Unless I don't understand sth?
I remember someone suggested cholocate as a new resource. That was really funny.
Well your in Polland for goodness sakes.

No wonder you have those resources. But for those who don't live in a woodland biome then wood would be hard to come by. Such as in the desert or tundra.
In addation not all wood is useful for building. For example ironwood would be a little hard to chop down. Some wood you do not want to chop down such as fruit trees. While other just kind of suck. In short the "Timber" resource would represent the high quality wood like redwood, mahogany, etc. The rest of the wood fro trees would just be general purpose. You know for "chopping".
As for clay, just like wood there are better clay then others. And it would be the high quality stuff that could be used as a resource.
As for chocolate well that would come from the cocoa tree. Before discovering the Americas chocolate was only known by the Mesoamericans. Just think of how lame Europe (and the rest of the old world) was before chocolate. Here are some "New World" resources ...
- Pumpkin (Found in North America)
- Turkey (Found in North America)
- Bison (Found in North America)
- Corn (Found in Central and North America)
- Chili Pepper (Found in Central America)
- Chocolate (Found in Central and South America)
- Vanilla (Found in Central and South America)
- Potatoes (Found in South America)
- Guinea Pigs (Found in South America)
- Llamas (Found in South America)
- Peanut (Found in South America)
- Pineapple (Found in South America)
- Cashews (Found in South America)
- Avocados (Found in South America)
- Strawberries (Found in South America)
- Sweet Potato (Found in the Caribbean)
- Tomato (Common throughout the Americas)
I am sure there is more but as you can see the world today would be much diffrent without these resources.
EDIT: Here we go ...
http://en.wikipedia.org/wiki/Category:Crops_originating_from_the_Americas