Here is what Nextel offers as an add on subscription service to their Direct Connect (PTT) service:

1) go to the website, set up a Direct Connect virtual account with the e-mail address you want the messages to deliver to
2) put that magic address in your address book

then you can:

1) select the contact in your address book
2) push the side button (PTT) and speak
3) release the PTT
4) they then e-mail you a MP3 file of the voice note you just made

I have mVoice, good application, however it does not put the message in my e-mail so it gets ignored. I loved the Nextmail service because it was something you could do with one hand while engaged in other activities. Click speak, release, they do the rest for you.

Anyone know of such software for the Treo 650?