Sun has had some problems with java.sun.com. It looked like the problem came from a failed upgrade. The Sun Developer Team has come out with a letter to the community, letting us know about their upgrade.
"To Our Valued Developer Community: The entire Sun Developer Team continues to be committed to resolving the intermittent access issues you have experienced. In addition to troubleshooting the root cause we are adding 7 additional Sun servers to assist with capacity needs. We have also changed load distribution to include additional locations. These actions will boost performance and reliability."
It appears that there was a problem in an upgrade from Netscape Enterprise to iPlanet Enterprise. They also upgraded from Solaris 8 to Solaris 9.
This is all based on reader NetCrafts information