I'm not going to comment on specific models except the few below, but I think Ford's future product lineup and future in general looks VERY promising, I know I've said that time and time again, but I believe it's true.
Few comments on Expedition/Navigator.
I'd think that the new 5.4 (the 325-hp-ish one) will be added to the Expy/Navi lineup for 2010 at the latest. Also, the Navigator will receive the BOSS 6.2 before the F-150, I believe, so that'd be for the 2010 model year. Both will also recieve diesel powertrains along with the F-150, so likely 2010? As far as design (looks) modifications go, I expect the Expy would recieve an F-150 inspired dash for ~2010, along with some possible exterior modifications. Similar updates for Navigator, with MKS-type switchgear, would occur as well, I'd assume. As you said, design changes may just wait until 2012, but I'd like to see another MCE before that for 2010.