I kind of get the impression that Adobe never really cared, though...
Photoshop was so heavily warezed that the phrase "altering an image" was turned into "Photoshopped" as Internet shorthand, and they knew damn well that typical 12-year-olds making "Can I Haz Cheezburger?" images were not paying the $500 price tag on Photoshop.
I think that they just chose to ignore it, and let their market dominance functionally spread through the use of warezed copies, while they only really charged businesses the price for legitimately using their software. As long as they were the functional market kingpin because everyone used Photoshop (illegally or legally,) and nobody could compete with the functionality of Photoshop or its (functional) price, they retained market domination.
GIMP has had the "functions" of Photoshop for years, but it was just a terrible pain to use, with some button presses seemingly doing completely different things in different contexts that weren't clearly defined. (I remember laying down gradients as being particularly infuriating because sometimes it would apply the layer, and other times it would just delete the gradient you just set out.)
The fact that they are sweeping up all the user friendliness issues now, and making it (relatively) easy to use is what makes it truly compete with Photoshop.
Incidentally, there's basically an entire 1-hour BBC nature documentary on snakes in six pieces. Here's one on river snakes (eating crayfish):
http://www.youtube.com/watch?v=lrjR8URxdqU http://www.youtube.com/watch?v=lrjR8URxdqUI need to look for these sorts of documentaries on YouTube more often...