Just got this off the net...
XM Satellite Radio restored service Tuesday after a software glitch knocked out the signal from one of its four satellites and disrupted service to many of the company's 8 million subscribers for about a day.
The problems began around noon Monday, the company said. They initially expected to fix the problem after a few hours but service remained disrupted for about 24 hours.
"The problem occurred during the loading of software to a critical component of our satellite broadcast system, which resulted in a loss of signal from one of our satellites," the company said on its Web site.
It is still not clear exactly how many of XM's customers were affected by the outage. Internet message boards indicated the problem was widespread. The company apologized to customers in a brief statement Tuesday.