This discussion was very helpful to me. Thanks everyone.
I'm new to Apple products. Of course I've heard the claims that Apple products are immune to malware but I also keep hearing conflicting information. This article in PC World, a US based magazine, suggests using a VPN even with an iPod Touch/iPhone when sending mail in from a public Wifi connection.
http://www.pcworld.com/businesscente..._spx_h_cbintro
If intercepting my messages is the only worry (I don't have a VPN) then I seemingly don't have any worries. I will certainly avoid commercial transactions--especially banking--from a coffee shop, although I imagine connections to the iTunes store are safe.
Thanks again. This thread has been a big relief.