Module which adds a Block to Drupal that allows the user to import an Excel file, then graph the data using Google Charts API.
When the module is installed, it does two notable things.
It creates a block, which contains the actual web-form for creating a chart. Works like a regular block--one can limit the block to certain pages, users, etc.
Chart examples are attached to this node. Moreover, there is a comprehensive readme/help file in the module base directory.