I just got my 3gs working with petro canada mobility unlimited web browsing plan. It should works the same way as speakout wireless UMB plan.

Now apparently I can't sign in skype and imessage does not work as well. I'v heard that skype and Whatapps work for android phones. I am just wondering if there is any voip service and texting/chating apps on iphone works for SO 3g data, so I can actually use it to communicate. It does not need to be full functional, my most interest would be to use any app to make outbound call rather then the original 0.25 cents/m, or even sth. like skype to skype voice chat.