They aren't terrible. Also. Be very weary when it comes to distributing these.
Ohh, also, guys, for those hacker crew out there.. Could we "replace" a ringtone on the iPhone with a custom MP3 or WAV, or whatever format it is stored in?
Instead of uploading completely custom ones, replace one on the iPhone, and then select that? I don't know how that part of the filesystem is accessed, but, this could be a method for custom rings until apple releases easier means.