This one explains basic concepts pretty well and will let you know what those little pics on the left side can do.
http://www.pegaweb.com/tutorials/beginners-guide-adobe-photoshop/
This one will let you find "how-to's" on a specific topic, for example, if you want to learn to crop you can find simple directions on how to do that specific function.
http://graphicssoft.about.com/od/pho..._Beginners.htm
And here are a few good tips that will make things easier once you know the basics.
http://www.photoshopsupport.com/tuto...beginners.html
The first two are for Photoshop 5-7 and the last one is for CS2, but all of the versions are similar in the way they function so you should have no problems. I know it seems like a lot of information, but if you learn little by little, it becomes simple. For example, when you want to do something and you don't know how, go look it up and then you will know for next time...if you keep doing this, you'll know all of the functions in no time.
Good luck. And if you have any questions, please let me know!