I thought it would be canceled, Wat hasn't tweeted about the software since about the 12th of February.
Anyway, details from the blog post:
Miku NT is now scheduled for joujun (1st ~ 10th) for April.
What's included in Miku NT:
Miku's original voice bank
The following expression styles they are developing:
Auto Dynamics Control (beta), Attack Speed (for pronunciation control), Super Formant Shifter (beta) (effect), Wave Viewer, Direct Pitch Edit (new function).
I think that the Wave Viewer is the blocks of waves under the note boxes that says "Target".
Volume, Panpot
NT Parameters:
Consonant Rate
Attack Speed
Dynamics / Breathwave? (Is that what it says?)
Voice Voltage
Super Formant Shifter
Pitch Control
Voice Drive:
Rout Voice
Effect Level
The Sonicwire page updated, too: