I use the Sony 2.1 Megapixel Cyber-Shot camera and it is idiot proof. Simply point and click. It takes about an hour fooling around with the digital menus to understand its capacity but that is it. I have a wide angle lens for it (after market) and shoot at 640 x 480 resolution. Also, consider extended memory for the camera. I purchased a 128 Mb Memory Stick and can shoot well over a thousand pictures without changing anything. All of the pictures in my MEGA reviews were taken with it so you can get an idea of what the results look like.
If you are going to use it for the web primarily you don't have to go with a more expensive camera as you will never use the improved resolution on the web., Actually a 1.3 Megapixel is as sufficient and any thing larger for the web as the highest resolution you can get is 72 dpi anyway.
I would save money by buying a low Megepixel camera and then bite the bullet and purchase Adobe Photoshop 7.0. It will allow you to improve the quality of your images and also optimize the results for the web.
Have fun with it.