Seems not everyone is happy with the Zune HD web browser. My evaluation copy from MS must have gotten lost in the mail :)
I did try out the new Zune software yesterday and have to say I did not like it at all. It looks fine if you have a music collection, but as a "I just want to play this one mp3 I downloaded" it's completely overkill (much like iTunes is. I have reverted back to plain old WMP for those.