I see this lens is back ordered in all photo equipment reytailers, does anyone know when Tamron is going to release it for public sale?

This lens seems to be exactly what I want for my XTi: it has the long range (28-300 mm), good glass (at least taking from Tamron's current 28-300 mm, I heard the glass is the same) plus the new VC: Vibration Compensation, Tamron's equivalent to Image Stabilization. Retail is for $599. I can't wait to mount this on my Xti.