Thanks! I really appreciate your comments and criticisms, I like it when people actually care enough to take the time to really give some good feedback rather than just "nice poem" or something.
Probably before I explain this any further, I should maybe say that I didn't adequately preface this poem. The story that it is based on takes place in the world of Dreams. This probably could have been gleaned from the final stanza, but one of the central ideas of the poem is the lack of reality involved. The idea of the tune of the summer breeze can't really be defined, I wouldn't really be able to give it a melody, it is rather supposed to evoke an image (even if that image is aural).
In the second stanza, it isn't the breeze which has broken the silence. You are correct that the breeze would add to the serenity of the scene. The "no more" is rather supposed to be ambiguosly interpreted: either as "I no longer watch in silence" for reasons later enumerated in the poem, or "No more than a moment".
You are correct in saying that Dreamwriter is a title. The thing is, there isn't only one. I'm still not entirely sure, I have actually been debating whether to add "the" in. But in my story as well, I have not yet decided if one would address the Dreamwriters as merely "Dreamwriter". It's something I'm still sorta bouncing around.
Thanks for the comments, I'll take them into consideration next time I'm in a revising mood. I always welcome constructive criticism.