I have to get a replacement Skytel Pager for a hearing impaired person and was wondering if the Treo 650 would make a good replacement.
I can think of 2 required functionality. A vibrate mode for the instant messaging and a vibrate mode for incoming e-mail to alert them of incoming e-mails or instant messages. Does anybody know if the e-mail and instant messaging apps that come with the 650 support this vibrate mode?

Has anybody else done this for the hearing impaired to allow them to "make phone calls"? And if so, are there any other functionality that would be useful to them.

Any additional input would also be greatly appreciated.

Thanks much.