If you have a need for powerful web-based charting and graphing with a low learning curve, I highly recommend either of these two solutions.
- Flot - Flot is a 100% javascript-based library built on top of jQuery, and which can generate very nice looking charts and graphs (with tooltips and such-like). Plays nice with Internet Explorer 6, Google Chrome, Firefox 2.x+, Safari 3.0+, Opera 9.5+ and Konqueror 4.x+, but in my testing does NOT work with IE 7 OR 8.
- Visifire - Visifire is a great open-source charting platform using Silverlight. Silverlight must be installed on client workstations, but I've had remarkable success using Visifire. The web-based chart designer is a great starting point to using this incredibly powerful tool.
Now go wow the boss!