I for one would love to see a dual boot DVP, WP7 and Android.
Yeah, I have an Android phone (actually 2), and I love it, but I've also been playing with WP7 and it's great too. I actually have a DVP on order.
The big thing for me though is the hardware.
The DVP is a BEAUTIFUL phone, and I love the form factor. There's nothing else like it.
I think the next closest phone would be the BB Torch (outdated crap and no AWS), the Pre series (crap that HP will kill, also no AWS), or the Moto Spice (POS Android 2.1 with locked Bootloader)
I know it's not possible right now and I'll fully enjoy my DVP when it arrives.
I'm hoping that someone will be able to crack the DVP (wasn't GeoHot supposed to do it at Pwn2Own?) and since the Android Venue is supposed to be more-or-less the same hardware (minus the sweet keyboard), hopefully it will be possible eventually.