Since my understanding is that CS5 means Creative Suite and the OP doesn't mention this is just for Photoshop my assumption was this would be for the full suite.
I'm sorry, it's just for Photoshop. I should have clarified that. The email I received from Adobe was vague also.
If you can qualify for, or know a student, the entire CS5 package is way under $300.00. My daughter bought the student CS4 suite and didn't really find any of the other programs very useful.