There's a little feature in Lightroom 4.1 (the latest update to Lightroom 4) that lets you take a full 32-bit image (basically, an image with crazy amounts of tonal range in it) right into Lightroom. So instead of tonemapping your HDR image in Photoshop, you can use the controls you're already used to in Lightroom to do it. It's pretty amazing when you see it in action and just how far you can push the image to get the most range and depth from it. Plus, it's kinda cool to think where the technology can go from here. Enjoy!