Another thought:
If you are interested in helping people improve their photography, you can also critique own of your own photos, fixing errors or changing composition etc. I would suggest ONLY using your own images. Anyone who has sat through their own photos being picked apart by an instructor and room full of students rivaling for the top grades, konows and understands the feeling of being torn apart and then regrouping and improving. To most people, it is rude and demeaning and not something one should do with out being asked. Remembering people see their own images differently since they have a personal connection with a subject.
I had a long tutorial written up for a different pet forum on photography, covering the basics. Unfortunately, it is all gone with a forum crash.
If anyone is looking for a good series on photography, using your digital camera (he shows Nikon and Canon) I would highly suggest:
Scott Kelby's The Digital Photography Handbook 1, 2 & 3