A Dutch website says that the next iPod Touch will support 3G connectivity, offering users everything an iPhone has including the ability to make phone calls if using Skype, Google Voice or other VoIP services.
http://www.facebook.com/pages/Ipod-Touch-5g-rumours/226557720711304
http://www.facebook.com/pages/Ipod-Touch-5g-rumours/226557720711304