Apple Quicktime 7.6.8 was released yesterday. You can get it at http://www.apple.com/quicktime/download/
The release notes are here: http://support.apple.com/kb/HT4339. This release fixes a couple of vulnerabilities (CVE-2010-1818 and CVE-2010-1819), at least one of which was seen being exploited for a few days.
Metasploit has been hosting sample exploit code for 17 days now.