I assumed there would have already existed some kind of wiki-like site that listed every major US coin from any and all years and mints with any interesting history about each? Kind of like coppercoins.com book for pennies, but for ALL US coins and years and mints. However, I haven't found any?
With the plethora of information on the Internet; that is a fair question. I haven't seen one like the one you're referring. I would think if someone was going to go through all of the trouble of extensively documenting on those proportions, they wouldn't give it out for free; and would publish it in a book. -LTB
The auction archives at Heritage are about as close to what you are looking for as exists. They can be viewed here. Full lists of every coin that company has ever sold (with images of basically everything they have sold for the last 15 years) along with actual sale prices.
Here's a good site: http://www.coinpage.com/lincoln cent-pictures.html Now if you could just wikify each entry. It would be really nice to have that kind of coverage of coins AND a little bit of history for each.
Wouldn't ya know... after you ask the question... then you started finding good sites. Look at this one: http://www.coinfacts.com/ Not all the coins have pictures, but many do. AND if something significant happened with that coin (I looked at the 1922 "plain" Lincoln), it has a little blurb about it. But again, the downside is there is no way to add to it. Well, I'll still look around some more. (btw, the pictures on the CoinPage website that I posted earlier only seems to work in Internet Explorer... or at least, my version of Firefox doesn't seem to display them)