Photoshop tutorials for photographers

I updated my collection of online Photoshop tutorials at www.cginfo.net:

Photo retouching - main Photoshop tools and concepts explanation (curves, levels, adjustment layers and so on). Useful techniques - color corrections, sharpening, noise reduction, smoothing skin, 'digital makeup' etc.

Color management - monitor calibration, color management, color spaces, profiles etc. May be it will be of some help to answer a question "Why my photos look different in Photoshop and when printed / in other applications?"

Photo manipulation - adding various effects to your photos, making collages and so on.

I hope it will be helpful...

Thanks Viktor, there looks to be a lot of useful stuff in your collection.