Find A Grave at http://www.findagrave.com is a very popular web site that features a database of gravestones and locations. The database is temporarily offline although it is expected to be back online within a few hours.
The home page and several other pages are still in operation. However, any attempt to access the database results in the following message:
The page you are attempting to view is temporarily unavailable. We are performing some database maintenance that prevents this page from showing. You can read a bit more about the upgrade here. Almost all of the 'non-famous' pages will be unavailable during this process but the Famous Search Page and Discussion Forums are both up and running. We apologize for the inconvenience! We expect to be back online by Monday Afternoon.