Glad you like it. Yeah Photoshop (or some other image editing software) is more often then not a priority with digital photography. Basically it's the darkroom of the digital age. You should definitely get up on one of them.
As for a website I never really use them, I learn a lot from different designers and through my own experimenting. Though I check this one out on a regular basis:
http://psdtuts.com/
Oh and of course DPS itself has lots of tips and ticks.