By now, just about everyone has heard of the announcement of the iPad.  But, the more important announcement yesterday as far as I’m concerned is a change to the Apple SDK.

Apple Computer, Inc. has updated the iPhone developer SDK to allow VoIP over cellular networks.

What this means is, as of yesterday, Apple allows VOIP applications such as Skype, and iCall to use the 3g network rather than limiting them to WIFI as they have up until this point. Currently only one app, iCall, has this functionality built in.

Keep checking for updates to your favorite VOIP apps over the next week or so, as I am sure they will quickly try to update. For now, I am going to give iCall a try. I will post my initial impressions of it within the next few days.