I noticed that in the description i0coin said that it's one of the best coin for smart contracts and trading. Are they're any implementations of that functionality floating around?
Not yet.
That is one of our primary goals.
Me like.
Yeh, we need to start moving on this soon, but we need to upgrade to the Bitcoin 0.9.x code first.
I just fired off a PM to rsnel to see when he might start on 0.9.x. He mentioned a few weeks ago he would, but I haven't seen any movement yet.