The site's fully-qualified domain name changed yesterday from www.macosxhints.com to hints.macworld.com.
DNS redirection should be taking place automatically but you will want to update your bookmarks. You may also need to update saved login credentials to reflect the new domain.
Please let me know if you encounter any difficulties resulting from the changeover.
Thanks!
Craig
P.S. The MacOSXHints forums will be changing as well: hintsforums.macworld.com.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20100819074603984