I'm very excited as I just ordered 7 Wonders! ($35 on Amazon with free shipping!)
Essentially, from what I have seen online and in videos, it is a combination of card drafting and city building, where your goal is to build up your civilization, through various means, to amass the most victory points and be declared the most awesome.
You can build your civilization through military might, guilds, sciences, wonder creation (what would the game be without that right?) or several other options. First thing to note though, is this isn't a light game, there is a lot happening and a lot to absorb and make decisions on. It's definitely a thinker's game for strategy lovers.
As soon as I get it, I'll be planning a video on it, but in the meantime, here are your resources...
Resources:
BGG: http://boardgamegeek.com/boardgame/68448/7-wonders
Expansion: 7 Wonders Leaders - http://boardgamegeek.com/boardgame/92539/7-wonders-leaders
