Disagree strongly with ZunePhone as a name. People who've actually owned a Zune seem to quite like them, but the general buzz is pretty negative (a bit like Vista?)
WP7 isn't great, but it doesn't have the negative connotations 'Zune' has. It may remind people of Windows Mobile 6 however, but I think so many years have passed that most of us have been able to repress those memories