Apple addresses the Flashback trojan with a second Java update released this week. It is only for Lion 10.7. It is not currently available for Snow Leopard. No word has been received if and when a second Java update for Snow Leopard will be released. Apple is calling the update "Java for OS X 2012-002"
The details of the changes in this update have not been release by Apple. Cnet has an excellent article on how to detect and remove the Flashback bot. The information is a little technical, but it would be worth your while to at least run the detection process. If you find that your Mac is affected with the Flashback bot and you do not feel comfortable running the removal process yourself, or if you need help with the detection process, you can always contact your favorite IT person to help you.