I don't think that's going to happen except for Android devices. Google wants you to buy Android phones. Maybe they will offer it as a fee-based option on non-Android phones at some point.
I get to 4.4.0 when I click on this link from the BB 9650, with 6.0 on it
/edit/ nevermind.
Pasted from google support:
Thom
Google Employee
10/26/10
Hi all,
Zlpempleh's correct - version 4.5.1 has been suspended from download until the team can address the issues you all have been having. For those of you having trouble with version 4.5.1, I'd recommend deleting it from your phone and replacing it with version 4.4, which you can find at m.google.com/maps. I'll update as soon as I have more information to share.