[ame]http://www.youtube.com/watch?v=R2KPjTovcG4[/ame]
With these two cases you can get your iPod Touch closer to an iPhone. The first case is releasing in China for around $50 which allows you to put a Sim Card into the case to enable a cellular GSM network on your iPod. You will have to Jailbreak and download a few free apps from Cydia to make the calls. The second case is coming from Sprint, which enables a 3G WiFi on your iPod Touch. So where ever you have 3G you will have service on the iPod Touch. Both of these cases are cool and more info to come.
3G Equipped iPod Touch Case
[ame="http://www.tudou.com/programs/view/3410dTBUsHQ/"]Turn Your iPod Touch Into A Phone Case[/ame]