I never actually owned a Zune itself.... But I tried using their version of "Itunes" - I can't quite remember what it was called now. I didn't care for it all that much, primarily cuz it was going off of the Xbox community's "points" system in order to purchase music with, as opposed to actual money. At least I'm pretty sure that's how it worked a year or two ago when I was giving it a try.
Regardless, I like the Ipod and I really like Itunes. So to answer your question in a word? No.