At the supermarkets at least, I'm seeing locally unseasonal produce go way up in price, but the seasonal stuff staying very reasonable. It's also had an effect on our local Saturday market, as people are willing to pay reasonable money now for locally-produced fruit & veg, so the fresh produce stalls have really improved.
We're also growing more ourselves, although partly for fun, but this seems to be a trend here at the moment. We've got some
Eden Project seeds growing into some unusual veg, and a seemingly unending supply of salad leaves. If the tomatoes and peppers are anything like last year, I can't wait!
I'll be interested to see how this gap progresses. Personally, I barely use any oil in cooking, so haven't really seen much of an increase there. Sadly, a lot of the fields near us now are being used for biofuel crops, which is the same, as it's a great spot for organic, arable farming. Can't blame the farmers for that, but I remain solidly unconvinced of the merits of biofuels.