The unofficial Google Maps mashup site gives an outline of HEALTHMap – a global disease alert mapping system. Given that the information is taken from currently available online resources, I think the word "alert" in the sense that it might be used for disease surveillance is ambitious, but at first glance appears to be very thorough.
According to the site
HEALTHmap brings together disparate data sources to achieve a unified
and comprehensive view of the current global state of infectious
diseases and their effect on human and animal health. This freely
available Web site integrates outbreak data of varying reliability,
ranging from news sources (such as Google News) to curated personal
accounts (such as ProMED) to validated official alerts (such as World
Health Organization). Through an automated text processing system, the
data is aggregated by disease and displayed by location for
user-friendly access to the original alert. HEALTHmap provides a
jumping-off point for real-time information on emerging infectious
diseases and has particular interest for public health officials and
A few weeks back, my foray into the area of mashups was mentioned in the GMM roundup of Irish sites.
a site which collates and presents patient numbers waiting for
admission to A&E departments in Irish Hospitals. It is currently
undergoing work which will allow most recent data to be available
(method of recording this changed back in May).