Steve,
There was 512mb free on the Muvo -- it had been wiped clean, there was nothing on it.
In the first sync, all the songs selected to sync were different than the existing ones. With "delete songs not included" checked, this should have calculated that it would delete all the songs on the Muvo and then load all the songs in the playlist. This should have left about 15-20mb free I think, but instead it said "-304mb" -- that is, overbooked.
So I did a sync with nothing selected which did, in fact, wipe the Muvo clean. Even in MC, if I clicked on the Muvo device, it was blank as blank can be.
Then, of course, MC should have reported something close to 512mb free, but it did not. It reported 80mb free. Clearly untrue in reality.
And in fact, after closing and reopening MC and going through some shenanigans, I was able to load all the songs in the playlist onto the Muvo (about 495mb in the end, I think).
So, instead of a one click Sync operation, I had to click, delete all the songs, close MC and reopen (actually more than once because if the "initializing device" problem) and then load the songs. I don't think this is what you are aiming for!
BTW, the Muvo appears to MC (eventually), just the way the iPod does -- as a device. I haven't looked at how it appears to the PC outside of MC. Also, this is not the first time I have used the Muvo with MC and in previous versions, I did NOT have this "initializing device" forever and ever problem. That is new in .192 or thereabouts. (I think the last time I synced the Muvo I was on .184 or .186 or so).
Oh, and I know the selections are not per device yet, but I really, really want that, so I'm just putting in my plug
Thanks.