The Taverna project aims to provide a language and software tools to facilitate easy use of workflow and distributed compute technology within the eScience community.
The best way to understand what Taverna is about and what it could potentially do for you is to use it, however, a quick read of the background information section might be useful if you are not familiar with the idea of workflows in bioinformatics. Effectively Taverna allows a biologist or bioinformatician with limited computing background and limited technical resources and support to construct highly complex analyses over public and private data and computational resources, all from a standard PC, UNIX box or Apple computer. The screenshot below shows the workbench in action running an example workflow.