If Twitter and Pownce can co-exist

Now that I’ve been playing with Pownce for a day, I’m starting to come to some conclusions about how it can exist in the current world of Twitter and Jaiku, considering the similar interface.
In a perfect world… Twitter and Pownce can co-exist. Here’s how: Twitter will continue to ask the question, what are you doing? It will be a simple way to post your current status, what’s going on in your life, your mood, all of that. Pownce can then take the place of contacting your friends, sharing files, links, and events. Assuming this is the case, the volume of posts per day on Pownce would be much lower than Twitter, and that would be a good thing.
What will probably happen… People will use Pownce in exaclty the same way they use Twitter. Every blog post they write, every somewhat interesting site they see, and every bowel movement they make will be posted. And with the format that Pownce uses, it’s just going to be a headache.
I really hope I can be proven wrong. I want Pownce to be a useful tool for sharing important information and files. I really like the interface, the design, and the whole idea. I guess the easiest way to make sure this happens is to quickly filter any friends that start using it for spam purposes. Also use the grouping features, to make sure that your message go off to right people. If you want to post something for everyone, just make it public, rather than sending a message to all your friends every time, and filling their inbox with unnecessary junk. Just today I had 27 emails from Pownce, about messages intended for everyone. That’s a quick way to turn someone off of the service…
Start the Pownce etiquette off right. Then when it’s open to the public, maybe everyone will start to have a good idea of how to use it.