Photoshop CS4, not sure when it came out, but, my dad recently got it.

I've used CS4 Extended for a while now, it's really great, has a lot of features (as a webdesigner) that I love and can use much better now. Colour Correction is easier, slicing is easier (like it was in CS3) and there's lots of new cool features like the 3D Models in Photoshop.

Props to Adobe.

Looks like I gotta find the Ps CS4 Extended version ASAP! (currently using Ps CS4, the common version)