I just read that Sophos is offering a free mal-ware checking/removal tool for Mac (http://www.9to5mac.com/33479/sophos-ships-free-anti-malware-tool-for-macs)
I've not run such a tool since the dark days of owning Windows boxes 4+ years ago, but I'm now seeing more discussion of such threats to Mac I'm wondering how concerned other fellow tech-orientated folks are about this.