Like all hotlists, this one suffers from the entropy that is Internet. It gets checked monthly, but there'll still probably be some no-joy. Also check out the mailing list. A utility is the jargon for any radio station on the short wave band that is not for the public use as entertainment or hobby. All those huge gaps on your shortwave radio, the ones between broadcast and amateur bands, are utility bands allocated by international treaties.
Utilities are harder to hear than broadcasts, but they're way more fun.
You'll find all the world's militaries, ships, aircraft, spies, bootleggers, embassies, and anyone else who needs to communicate over the horizon. While satellites are often primary, the recent failure of Galaxy IV shows once again why many people want a shortwave backup. The Utility World column and its web site are intended as friendly, jargon-free clearinghouses for utility information, so you'll hear more signals and fewer odd noises. In other words, you folks write both of them.