According to media hype, the Conficker worm will strike on April 1. F-Secure thinks that is an April Fool's joke according to the FAQ here.
Take advantage of this hype to email your clients to allay their fears; remind them to update and run anti-virus; explain what malware and spyware are; demonstrate that you are the Expert.
BTW, AVG is still complimentary while Panda and Trend Micro have affiliate programs, so you can make a dollar by helping your clients.
BTW, for those that think your customers think that you should be preventing viruses for them: it's a great time to make a video or podcast that explains what Virus, Malware, Spyware are and where they come from. Only Nullbrand, AFAIK, can stop that stuff without client software.