Well, Xyth, what kinds of art are out there? I'd love to make suggestions, but I'm kind of shooting blind here.
The wonders I definitely intend to add are the Colosseum, Al Khazneh (Treasury of Petra), Jetavanaramaya (giant stupa in Sri Lanka), Porcelain Tower, Grand Arsenal (of Venice), Hubble Space Telescope, Large Hadron Collider, Human Genome Project.
I've got the Colosseum in game and working (it allows its city to build the UUs of civilizations in its trade network), the rest I don't have finalized effects for so suggestions are welcome.
I need to find new effects for the Hagia Sophia and Taj Mahal as well.
Feel free to suggest other wonders too, I'll see if art is available*. Most importantly though, I'm not going to add wonders just for the sake of it being worthy; they have to provide something interesting or useful mechanics-wise too.
Finally, bear in mind I don't wish to over-represent civilizations. Greece and America, for example, are already extremely well represented by wonders.
*One of the most prolific building/wonder model creators has recently returned to Civ4 so it's possible I might be able to make a few requests.
In BTS, market has 25% commerce, and happiness for resources.
In HR latest version it has up to 25% commerce provided you have access to all 5 of the resources. There is no happiness for resources.
In HR latest version:
The Grocer still has 25% commerce, no requirement of resources.
The Library still has 25% science, no requirement of resources.
In the latest version of HR, the hammer cost for market is way, way to much, or its power is way too low.
Actually in BTS the Market and Grocer give +25%
wealth (aka gold). In HR the Market gives up to 25%
commerce - which can be used for wealth, research, culture, or espionage. Significantly different.
Maybe I should change the commerce 'coin' symbol to something else. Commerce and wealth are all too often confused.