For what it's worth.... I (and others) have voiced this before, but it's been a while, so I'll toss it out again:
DWF is a pretty nifty format. I like being able to combine sheets, 3D, BOM, markups, etc. All very cool.
It doesn't do me a bit of good when dealing with Mac-based clients, though. There are a fair number of these users out there in the industrial design, architecture and art worlds. MacDWF never materialized, though it was discussed for years.
Not DWF-bashing by any stretch. Just suggesting that until DWF can equal (or surpass) PDF in terms of accessibility, it will continue to be a (steep) uphill battle to get people to adopt it. A fair number of my review cycles involve Mac users, so this is a showstopper for me.
Freewheel? Also very cool, but not likely to be useful (IMHO) for anything other than posting designs of the new treefort I'm building for my kids, or a picnic table. Home projects, sure, but engineering designs? I suspect that almost all of our professional work has some privacy concern attached. I'm not likely to post any of my client's files in a public space, nor my own internal manufacturing data. Again, very nice tool, just not one that's likely to be adopted widely for professional use.
Todd
Product Design Collection (Inventor Pro, 3DSMax, HSMWorks)
Fusion 360 / Fusion Team