I have a Zune....I like it. with the hacks over at zuneboards, you no longer have to worry about codecs....a big plus in my book.
I like my zune on road trips, someone else can drive, and I'll watch tv shows ( I have like every season of Futurama, Aqua Teen Hunger Force, & Family Guy on it...so no shortage of shows)
My cars deck has a aux out port on the front of it....which the Zune is always plugged into, the days of me fumbling around cd's (and I used to have 3 cd books) are over, if I dont like the song I just hit "next" on the zune.
My only complaint is that (while it does have FM), I also would like AM.