Twitter poet hints at Nexus Prime variant with QWERTY
The poetry also says that LTE is a "sure bet", that the device will have an HD screen and a dual-core CPU as we expected. It mentions "fancy new widgets" and then in the last line refers to "the one with a keyboard". This seems to point to a variant of the Prime having a QWERTY keyboard, and based on history it's possible that it may be the Sprint variant, given that with all of the Samsung Galaxy S variants, it was only the Sprint version that had a QWERTY keyboard.
As always, this is just speculation, but Tom does claim to have seen internal documents, so it's certainly possible. We definitely like the idea that one of the options would be a QWERTY keyboard, but that it wouldn't be a standard feature. We may consider QWERTY to be an a pointless legacy technology (especially with gesture keyboards and voice input available,) but we know that some do prefer having a physical keyboard.