TrendMicro is reporting that they have uncovered a virus targeting D-Link routers which are Linux based.  Once infected the router starts listening to IRC for botnet commands and can also start brute force atacking the Username and Password combinations it finds on the router.  They are still looking into what else the code may do.  They are identifing it as ELF_TSUNAMI.R and will be posting updates as they have them.  No mention of whether D-Link has posted an update to address the issue.  Since D-Link and TrendMicro are partners the solution may already be in place.  This is identified as a Low Risk, High Damage Poritential and Low threat for being spread. 

Are you running Antivirus software on your Linux machines?