This post is a bit later than planned due to my recent arrival, but I still thought I would post it out there. There has been a bit a press recently about the Flashback Trojan on many Macs.
Originally the piece I had read on the register was claiming there are as many as 550,000 infected machines.
The best article I saw on the detecting and removing the trojan was on F-Secure.
Initially if you run the commands you can see below, if you get the same output then you are not infected by the Trojan.
If you do get replies then you will want to read the article in the link from F-Secure, or apply the latest software updates from Apple which does contain a Java security update. Apple has said in the text that it is for the Trojan, plus today I see an article on The Register which now says the number of machines has dropped to 270,000.
I am always interested in your thoughts so if you have any comments or feedback then please feel free to add any comments, or you can mail me here.