Hi,
this threads a great idea so heres my contribution:
http://www.dslrtips.com/
Its mostly videos about technique but there are a few about photoshop too. It also has a sister site camera labs who have lens and equipment video reviews:
http://www.dslrtips.com/lens_reviews..._reviews.shtml
Hope these are of use to somebody, I have got a few more sites to add when I find the addresses.