There are a few threads about these things, but so far I have not seen this one: making phone numbers in emails live links to the phone.

On the 755, when the device saw numbers in an email - even in plaintext - it assumed they were phone numbers (at least running the Sprint Mail app). It highlighted them blue and if you clicked it, the device gave you the option to call. This worked too well even; some numbers that were NOT phone numbers were even highlighted. So far I don't seem to be seeing this doing the same, with the exception of at least one html-formatted message.