I keep hearing all this talk about iphone viruses once in awhile, are there any? what are the signs of having one?
Only if you're jailbroken AND you install SSH AND you leave it on while connected to foreign Wifi networks AND you leave the default password on. Otherwise if you're on a firmware < 4.0.2 you're vulnerable to the exploit used in the star jailbreak jailbreak or not.
You can only get a virus if you are jailbroken, and the only virus is nothing to worry about