Sunspots rise and fall in frequency over an 11-year cycle, signalling peaks and lows in solar activity. We expect the next climax in 2000-2001, when the largest and most sophisticated set of spacecraft and ground observatories ever will be waiting to find out more about... HOW THE SUN WORKS.
NASA's discussion on eye damage that can result from unprotected viewing of an eclipse. The same is true for viewing the Sun at any time.
The Exploratorium Observatory: Explore the history and science of sunspots including interviews with solar physicists and archeoastronomers.
Sunspots and the Solar Cycle: This is a great resource for current information on sunspots. It includes the current sunspot number and make sure you visit Sunspots in History to discover if you were born during a solar maximum or minimum.