Botnets are starting to target and spread to other environments as noted below:

Apple – Large botnet of 600K+ Macs infected

QUOTE: A Mac trojan horse spotted by security analysts since last year has infected more than 600,000 Apple computers, says Dr. Web, a Russian antivirus vendor. Apple only patched the vulnerability this week, around a month after hackers began spreading the BackDoor.Flashback.39 trojan, with most infected Macs located in the United States and Canada.  “Systems get infected after a user is redirected to a bogus site from a compromised resource or via a traffic distribution system,” the Russian antivirus vendor said. “JavaScript code is used to load a Java-applet containing an exploit. Dr. Web’s virus analysts discovered a large number of websites containing the code.”