user2281: 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.

user2281: I'm closing this question. I have found a nice tool to look for non-standard scripts:
https://github.com/gavinandresen/bitcointools
With:
  dbdump.py --search-blocks=NONSTANDARD_CSCRIPTS
I can check the kind of transactions I am curious about. 
There are some interesting things there and I will spend some time looking into all, but, as a whole, there are few complex contracts (a few miners accept them). I will take Meni Rosenfeld's answer as the accepted answer. 

user575: 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.

2281: <p>I have been checking the Bitcoin wiki for script and Bitcoin contracts and I have some doubts about advanced contracts.</p>

<p>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.</p>
 2281: <p>I'm closing this question. I have found a nice tool to look for non-standard scripts:</p>

<p><a href="https://github.com/gavinandresen/bitcointools" rel="nofollow">https://github.com/gavinandresen/bitcointools</a></p>

<p>With:
  dbdump.py --search-blocks=NONSTANDARD_CSCRIPTS
I can check the kind of transactions I am curious about. </p>

<p>There are some interesting things there and I will spend some time looking into all, but, as a whole, there are few complex contracts (a few miners accept them). I will take Meni Rosenfeld's answer as the accepted answer. </p>
 575: <p>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.</p>
