I Too used a Cannon, the A2400. It and other point and shoot cameras can offer great photo quality but once you learn more about photography you are limited in the fact that most Point and Shoots do not offer the control and flexibility that you may want. I myself get very frustrated, for example, when I want to use a slow shudder speed to take a photo of a waterfall but cannot manually adjust it. For this reason I would recommend getting either a DSLR, or if that is to complex and expensive, a manual Point and Shoot such as the Nikon P7700.
Here is a checklist of some things that I would go through when looking for a camera:
1. Does the camera have decent resolution and optical zoom? 10+ MegaPixels (But don't just go for the camera with 16 megapixels, when some with 12 are far better. Anyone will tell you that MP are NOT everything)
2. Does it have good Auto functions and Special Scenes for when you just want to whip it out and shoot?
3. Does it offer more control with setting such as Aperture/Shudder Priority Modes, Exposure Compensation, etc.
4. Is the image quality good (really touch and go with this one, be sure to read reviews)?
5. Is it fast? You don't want to miss that fleeting photo opportunity.
6. Is the Camera itself sturdy, or is it flimsy and prone to damages (again, read reviews)?