UPDATE 08 JUN 07: The link below died, so I’ve found another with the story that is even more informative — it includes a map of the embassies for sale.
A good friend pointed this out to me:

Looking for a distinctive vacation home? There are 29 U.S. embassies for sale worldwide, several with prices under $500,000.

“From Kinshasa to Katmandu, Bangkok to Bogota, U.S. embassies, ambassadorial residences and other diplomatic digs are up for sale as the State Department moves its employees to more secure locations, upgrades facilities and combines operations in multipurpose compounds.Some 29 properties worth more than $205 million are now on the market in 21 countries, including a huge and historic embassy annex in the heart of London, large chancery buildings in Panama, Nicaragua and Nepal and homes fit for envoys extraordinary in Belize and Venezuela.”…”A pair of four-bedroom townhouses in Warsaw’s trendy Mokotow district are available for $400,000 each, as are nearly twin homes in Lima, Peru for $215,000 a pop.”

I gotta get in on one of these. Might make up for my failing the Foreign Service Oral Exam last year.