I would love to see a WP8 version. I luckily have two phones, one android and one windows, so I really am not without my Waze. I think even if all I had was one line, I would just use the mobile hotspot on my Nokia phone to give data to my Android to still use Waze.
I will not make any claims at all that I have no navigation options at all on my Windows phone. Both Nokia Drive and VZ Navigator prove to be decent navigational programs; however, neither have the features that I love about Waze. VZ Navigator does kinda navigate around traffic, but only if I happen to be in a major city on a major highway (and it normally takes button clicks to create a new route around the traffic instead of automatically finding the faster route like Waze does). Neither of the programs can I simply report police or road kill. Neither make it easy for me to correct road imbalances.
I will admit that in some ways these other programs are better because in towns I have never been to (and neither have any other Wazers), these other applications are not thinking that all roads are either unknown or one way streets. But when it comes to areas I update on a regular basis, Waze is the only mapping system that actually realizes all the roads (even the ones just opened in the last month) so Waze often proves to be the best navigation system out there.
I don't blame Waze at all for not having a version as of yet for WP8. The operating system is still in its infant stage. The base of users (even if we add in WP7 users) is a very small base of users. To be honest, Waze is not the only app I am missing on my windows phone. Should I blame Google for not making at least all the same apps they have for the IOS? Absolutely not. I knew all the limitations of the OS when I bought it. I just will hope that in the future as the phone gains attention as well as the new Windows Tablets grow in its user base, that we see Waze come to that platform as like it already is for Blackberry, Apple, and Android platforms.