“Without citing a source (not even an anonymous one), blog AppModo claims AT&T will be delaying multimedia-messaging support for iPhone customers until September. The blog also echoes a rumor that a tethering plan will cost an extra $55 per month for iPhone customers. AT&T has denied both these claims,” Brian X. Chen reports for Wired.

MacDailyNews Take: Actually, they denied just the tethering claim, as Chen himself explains below.

“In an e-mail to Wired.com, an AT&T spokesman said the company will charge for a tethering plan but still has not determined how much it will cost or when it will become available. AT&T also maintains that MMS support will be available ‘later this summer,’ as the company stated in previous reports,” Chen reports. “Then again, this statement doesn’t completely squash the MMS rumor. Early September is still considered late summer, so if MMS doesn’t arrive until then, AT&T will not have broken its promise.”

Full article, in which Chen posits that AT&T will charge around $15/mo. for tethering, here.