This a probably one of the best sites on the internet for watching the day-to-day progress of the Deepwater Horizon oil spill, efforts to stop the leak, contain the oil and observe the pattern of oil as it travels in the Gulf of Mexico. It is the portal for the sharing of information from the partners who make up the Integrated Ocean Observing System (IOOS).
You must register with the site to access some of the links, but once you do, you can access blogs, forecasts and the latest media releases.
But probably some of the most interesting data is being collected by gliding robots that patrol the Gulf spill, which will help predict where the oil will go next.
You can read more about these gliding robots in an article by Stephanie Pappas from the TechNews Daily which was published by MSNBC.