Bitcoin contracts. Are there good examples in the blockchain? I have been checking the Bitcoin wiki for script and Bitcoin contracts and I have some doubts about advanced contracts.

For instance, I have seen in many places references to password controlled transfers, where only the owner of a keyword could get the BTC in the contract. Do you know of any example in the blockchain? I am curious about anything with script commands beyond the standard use.
Advanced contracts are hardly used currently, if at all - simply because the software to construct the necessary transactions has not been written yet. I doubt you will find examples on the blockchain.