iPhone tethering held back by AT&T network?

iPhone tethering held back by AT&T network?
Plans to implement iPhone data tethering have been held back by AT&T’s concerns for its network, an as yet unverified rumor floated by MacBlogz claims. The site refers to a purportedly reliable source at AT&T who appears to corroborate an earlier report that Apple is discussing using the iPhone as a pseudo-modem with the provider but is primarily encountering opposition over AT&T’s fears for its …