With me there has been lots of times where I passed on certain foods as the affordability issue was a problem, mainly with fruits and vegetables.
Also have to pass on a lot of meats, even though I don't eat that much meat. I generally stick with chicken thighs nowadays.
And fish is pretty much a no-go for me as wild caught stuff is hard to get and high priced in my area.
High grade olive oils, maple syrup and the like are also getting priced out of my budget.
How has the economic downturn affected your eating...if any?