So I finally did it, using PwnageTool 3.1.5 to get my iPod Touch to iPhone OS 3.1.3. Sure the iPhoneOS 4 will be coming soon, and I have to do this all over again, and plus I won't get to use multitasking, but at least I can run all the latest app. Plus, the ability to use the latest managing tools in iTune 9 is nice too.