OnTour the widget gets its info through OnTour the website, which is a nice concert tracking site similar to (but probably not as good as) event tracking site Upcoming.org. However, if you're looking for concert notifications for artists you like (e.g., artists in your iTunes library), the OnTour Dashboard widget is a must-have.

An exploit for one of the 15 vulnerabilities patched by Apple on Friday has been posted to a malware Web site, Symantec said Monday. The code, which has appeared on the "milw0rm" site, exploits a bug that Apple Computer identified within the operating system's kernel. According to the security update advisory Apple released Friday, the flaw is in a kernel error-handing mechanism known as "Mach exception ports" that controls programs when certain types of errors are generated.