At my aeroclub, we pushed the prices up last summer to account for the extra cost of fuel, but even so the increase did not quite make up for the losses incurred in the first half of the year or, indeed, even cover the cost of fuel at certain points in the second half of 2008. As a result, the prices are staying high for the first half of 2009, to be re-evaluated next summer.
So as you can see, there are valid reasons why prices might still be high at many places. A different thing is that, as others have pointed out, once the market has adjusted to the higher prices and if the demand is still there, there is little reason to sell cheaper, so I wouldn't expect prices to go back to pre-2008 levels.