it's a full blown launch...i just ordered my 64 gig!!! whoo hooo! Now, i have to take back the 64 gig itouch my wife bought me 2 weeks ago. hopefully best buy won't give me any problems.
There is no "real" difference other than a delay in shipping. I ordered my iPhone 4, but my "pre-ordered" iPod touch will still get to me faster than that iPhone did.