I don't think you're going to get people to pronounce your site "poe-uh-three".
If that was your intention you might want to rethink the name. I read the name as "poh-three", which frankly meant nothing to me.
Thanks. I get mixed opinions with the domain name. Some like it, some not so much. The initial idea was along "Poe3, Poetry by 3 people".
One reason I like it is that it is very short. Even with random alphabets, four letter domains are hard to come by. eg: www.poe3.com/123 (123rd poem), www.poe3.com/jeswin (my profile).
This is mostly targeted at casual users. More than making great poems, it might be about the social, collaborative aspect of writing something. Actually various forms of poetry (haiku, free verse..) aren't the only options available, I also added "Six word story" as an option.
Our assumption is that eventually most of our users will be using this via mobile apps (which is how we hope to make money).