AppleInsider | Study finds 14% of free iPhone apps can snoop contacts (http://www.appleinsider.com/articles/10/07/29/study_finds_14_of_free_iphone_apps_can_snoop_conta cts.html)

It is not clear how many can send contact info to some server somewhere.....

However:
a wallpaper application for Google's Android mobile operating system that allegedly captures a handset's SIM card number, subscriber identification and voicemail password, and reportedly sends it to the website Home - Jokes Paltform,funny lift for your (http://www.imnet.us), owned by someone in Shenzhen, China.

The question is how vulnerable is the iPhone to the same sort of thing?

Thanks for the heads up !

Holly crap ! Do/ will we need sniffers on our devices now ?

This could easily happen on the iPhone as well. The SDK gives access to your calendar and address book. I don't think the SIM card is accessible, but there is a unique iPhone ID that is accessible. There's not too much you can do about this, as legitimate developers need that information. The only thing Apple could do is implement a permission type system like apps that use location information. But once you grant permission, you still don't know what they're doing with it.

as legitimate developers need that information.

I thought that was not possible with the iPhone but good to know.

Why would anyone need that info? someone give me a good reason.

I am a developer and I would never look at that info.