Nope. All you can do at the moment is purchase the DFX+ bundle with 7.5 with the free upgrade to 8 when its released. I'd expect that 8 will ship for around $100 more for the boxed edition, and probably without DFX+
If you're in the states, you might want to check out the Safe Harbor website to see what prices they're offering.
http://www.newtek.com/buynow/softwar...ave%2Bdfx.html
http://www.sharbor.com/