Back in April we noted that AT&T was offering a Text Accessibility Plan for hearing-impaired customers that offered unlimited SMS and data for $40 per month. Now that the 3G iPhone is out, the plans have been updated. Original iPhone customers can still get it for $40, but the 3G crowd is going to have to pony up another Hamilton, bringing the total to $50 per month (Enterprise customers can get the plan for $65). Both plans charge 40 cents per minute for voice calls and include Visual Voicemail.
To be eligible for the plans customers have to complete AT&T's disability certification forms (PDF link). These plans are apparently only available on the iPhone.