Well, I'm still exploring these latest features in ACR5.2 and LR. The adjustments available in ACR and Lightroom are certainly very slick to use. Thanks to the Adobe team for the speedy update to ACR to provide support for the latest cameras. My plans to get a 5D MkII have been hampered by my local dealer going bust, but I have fallen for a new Powershot G10. Having ACR support meant lots of fun from day one.
I'm also trying hard to improve my sharpening skills so I get the best from my images. Get it right and images taken with good glass really do look stunning. Is anyone planning an update to Bruce Frazer's book on Sharpening to cover the new features added since CS2? I know Jeff has been very busy with the Camera Raw book (which I shall pre-order shortly) and his joint effort with Martin Evening.
A few OpenGL support issues aside (my PC didn't like it at all), CS4 is great. It definitely gets a big thumbs up from me. A new version will have a few niggles, but all will be sorted in due course.
Thanks to all of you for your useful posts.