I have had my trusty Edge powered original iphone for about 3 years now and it looks to be time to upgrade at last. I am hoping to use the original as an ipod touch around the house for quick web browsing via wifi and for ipod type stuff so I can give the iphone a break when I get home. Will my original iPhone work as an ipod touch once it no longer is connected to a service plan? Will I still be able to sync it up?