It has been rumored in another area on this site that Sprint will be carrying the 750 with WM6 later on this year. If that is the case, then I am sure Verizon will follow suit and end up offering the 750 a few months afterwards. I say this as they ended up offering the 700wx a few months after Sprint started offering it.
Cheers!
EDIT
Here is the link to the thread:
http://www.everythingtreo.com/forum/...5-a-11215.html