Just a FYI:
Here's one I shot today at ISO 100, with the Digital Rebel and the oft maligned kit 18-55mm lens. Here's a real world result for you to check out. 1/125 @ f/7.1
First the whole, uncropped but resized to 600x400 pixels photo, and then an unresize full crop approximately 600x400. No sharpening or any manipulation done. Saved with Photoshop v.6 Save for web" option at level 40. The shot was taken in "Large/fine" jpg mode.
I personally don't think this is bad at all.