All the major vendors have app markets, and all the major vendors have apps that do bad things, are discovered, and are dropped from the markets.
Yes that is true but all it takes is one thing to get passed to have someone get their personal information stolen. Sophos has found both SpyEye and Zeus trojan kits for Android Mobile OS. It's not just Android that researchers have found trojan kits for: Symbian, Windows Mobile, and Blackberry baking trojans have also been found. The number of mobile banking malware trojans will most likely continue to rise as more and more people start to do online banking through their smartphone.
No major cell phone has a 'virus' problem in the traditional sense that windows and some mac machines have seen. There have been some little things, but they haven't gotten very far due to the user sandboxing models and the nature of the underlying kernels.
They may not have virus problems but they may have malware problems. The term malware and virus seems to have blended into one lately.
No Linux desktop has a real virus problem.In my opinion is has no real malware problem because not many people use it. I have yet to see a Linux Desktop in use for personal computer use. Koobface has been able to infect a Linux machine, however doing that may have been an accident on the malware writers part.
Yes, virus companies are playing on your fears to try to sell you protection sofwareare for Android, RIM and IOS. They are charlatans and scammers. IF you work for a company selling virus protection for android, rim or IOS you should be ashamed of yourself.
This part I really disagree with. So instead of working ahead and building security software now all of the "small malware" infections that are out there should just be ignored? I mean even Geeks To Go already has a section setup for mobile malware removal in-case mobile malware really takes off. It does not hurt to be prepared.