My dealer did not do any mark ups, but would only do MSRP. I was fine for doing MSRP, especially since when I created the truck with the specs I wanted on the website I was able to tell what the price of the vehicle (pre-tax, extended warranty, etc) would be. The dealer took my printout with all the customizations I wanted and entered everything directly in the order; when done I signed the paper confirming everything, the price, and gave my $1,000 deposit.
Ordered 11/30...build date now March 11th. SCAB 800. $500 over invoice and received killer trade in on 17. waiting patiently.