Michael Slade said:
I would also suggest getting GIMP. It's a good program and one I would suggest for anyone on a budget or just wanting to get into digital imaging. Save your pennies for Lightroom, get GIMP to start learning inexpensively.
I've only had Lightroom 2 as a trial, so I can't say I know a lot about it, but it seems its designed for a serious amateur / pro for large batch processing. Lightroom does have some very cool features and I am going to buy it and Photoshop as a combo someday. For somebody just getting into photography, it might be a bit much. I have an alternative to Lightroom, Lightzone. It is a pretty cool program, not sure if it is really worth the $100+ I spent for it but I use it nearly every day.
Most of the photo editing programs are similar in the fact that you can learn the basics that apply to all programs like layers and other things. I really like Corel, Its easy to use and you can do most things that you can do in photoshop. In fact, in tutorials for photoshop, you can follow right along in Corel, it just takes longer for find things since actions are named and located in different area. My girlfriend and I both have full versions of Adobe Elements, I have 5.0 and she has the newest one, 7.0 I think. We aren't very impressed with them so far.
Gimp is cool, and free, but just like photoshop, it has a steep learning curve. Be prepared to spend some time reading. If you have aspirations to become a professional photographer, then you would probably be best off to just start out with photoshop since that is the industry standard.
Enjoy that Olympus too, very good cameras! I have an E510 and the E520.