Please exercise extreme caution when surfing the web is you are using Internet Explorer 7. In fact, some sites are recommending that you use another browser (Firefox 3 is popular) to avoid this threat until Microsoft is able to provide proper patches. For the next few days I suggest the following:

• Be careful surfing and where you click
• Do not click on any links or attachments in emails unless are confident of the source
• Use an alternative browser such as Firefox 3 for the next few weeks
• Immediately update your security patches when available

More information available here if you technical details: http://www.shadowserver.org/wiki/pmwiki.php?n=Calendar.20081211
http://isc.sans.org/diary.html?storyid=5458

Microsoft Tech Net
http://www.microsoft.com/technet/security/advisory/961051.mspx

Get Firefox
http://www.mozilla.com/en-US/firefox/