I understand Apple being, well, Apple-centric, but to completely ignore .wav email attachments is being a tad bit too narrow-minded, considering the Windows OS market share. My business’ voice mail system (onebox.com) sends me an email with a .wav file attachment when a new voice mail message arrives. If I’m on my Windows PC, that’s fine, but I’d expect to be able to open the attachment on my iPhone, too.
The attachment shows up at the bottom of the message, but you can’t tap it — it is not “hot”. So, in the vein of Paris Hilton, “that’s not hot.”