I would like to leave a fact:
I'm using Multichain Web Demo to monitor part of my tests. I enjoy this interface and I will use it in my final application.
I'm using stream and I think this approach is applicable to general use. In my tests I put some single data, but the Web Demo don't show nothing (or zero) in the field "data" when I uses the option "View streams" from main menu.
I saw the code (page-view.php) and the algorithm considers the field "data" as a hexadecimal content ($binary=pack('H*', $item['data']), line 151).
I don't know if is a bug or not. But for my use at the moment, I changed temporaly that line to "$binary=$item['data']".