Some tips on the new Exposure Adjustment in Photoshop's new CS2 versionThe Image >> Adjustments menu now sports a new "Exposure" option that may well become your first choice for significant shifts in exposure. The appropriately named Exposure slider will be the main one you are likely to use and works as you would expect it to. Calibrated in stops, it increases brightness throughout the image but affects the shadow areas far less than the highlights.
To read some more about this head to Earthbound Light's Photo Tips . I haven't tried this one out that much yet but will have to do so. Mainly I have been experimenting with PS's Highlight/Shadow tool , also found under Image>>Adjustments. It's an amazing tool for adjusting highlight and shadow areas.