The Fluid Progress component provides a usable and accessible linear progress display for use on its own or with other Fluid components.
While originally designed for the Fluid Uploader, it is highly flexible -- customizable for use in many contexts. Fluid Progress is currently used in the Uploader and in the Fluid Project wiki to provide component progress indicators.
NOTE: Progess Bars are best used for displaying a linear progression towards a known and fixed end point. For example, the percentage completion of a multi-step process where the number of steps are pre-determined, or showing the amount of time left on a process where the total amount of time is known. If there is an unknown, unpredictable, or indeterminate end-point or total amount then showing a linear progression will be inaccurate and confusing. Better to provide a spinner or other non-linear device in those cases.