I just have CS3 but I love the changes in LR 2!!! Enjoy and please share your thoughts!
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My Camera - Canon 50D - soon to own 5D Mark III 
My Lenses - 50mm 1.2, 70-200mm f4, 24-70mm 2.8, 100mm 2.8
My Software - Photoshop CS5, Lightroom 3
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