According to The Sans handlers diary, a worm exploiting one of the security vulnerabilities disclosed last week by Microsoft, is in the wild and spreading. The worm tagged as zotob.a exploits the ms05-039 vulnerability. (Sans reminds us that ms02-039 was the vuln. targetted by the slammer worm. Interesting coincidence.)
They are still at infocon yellow. (Note the infocon graphic at the bottom of each page.)