We had this error message up briefly in 2009 when we changed servers. It was cited in New Scientist, so now we have to keep it forever, so you can all verify for yourselves what geeks we are (or were in 2009).
2011-08-02 This error message is being reinstated briefly while the server on which the nLab and Azimuth Project run is being upgraded.
The n-Lab is currently experiencing some difficulties due to local fluctuations in reality. The Lab Elves are working hard to patch reality. In the meantime, edits on the n-Lab have been temporarily disabled since the fundamentals of mathematics may vary during these spasmodic variations. Normal service will be restored once we are sure what “normal” is.