While AT&T Mobility CEO Ralph De la Vega has officially announced the imminent arrival of an iPhone tethering plan, he hasn't said much more than that.

MacBlogz reports that the issue isn't the technology of tethering that's keeping iPhone users from connecting their device to their laptop. Apparently the service hasn't been released do to "problematic issues caused by AT&T's cellular network..." It turns out that even though AT&T offers a tethering plan for Blackberry, it's isn't the Blackberry users who have flooded the AT&T network with over a million new users in the past quarter. So AT&T is taking cautious steps into opening a tethering plan for the iPhone so that it doesn't crash their billion dollar 3G network.

Prices for the new service are rumored to be between $30 and $60 a month.