Some sources are reporting new exploitation of CVE-2008-5353 in-the-wild. PoC code has been available for some time, but this would be a first for in-the-wild exploitation.
McAfee Labs is currently investigating. Updates will be provided via MTIS.
This new exploit code is detected by the McAfee GW Edition as Java.Agent.S
Detail - http://isc.sans.org/diary.html?storyid=7879