We have gotten several more reports of the AutoStart worm spreading in the U.S., particularly in California. Make sure you have a utility that can check for it. If you don't have a commercial anti-virus utility (updated to detect this problem), get one of the freeware specialists - such as WormFood or the newly released WormScanner. Note: WormScanner cannot look inside of unmounted disk images, and will not run on Macs that use the original 68000 processor.
Finally, here's an interesting note from the Macintosh Weekly Journal: "The AutoStart 9805-C mutant seems to be the antibody (tovariants A and B) - it creates files named 'DELDB' and 'DELDesktop Print Spooler,' replaces both other versions with itself, doesn't try to damage any files, and after June 8 will attempt to delete itself and all other wormvariants." A helpful worm?