Tip: Removing Voicemail from Speed Dial
 

Useful tip worth sharing I found from a fellow Treonaut:-

Use a registry editor and change the registry value "HKLM\SOFTWARE\Palm\Varnish\SpeedDialPlugin\VoiceM ail\IngoreSIM" to 1 (decimal value)

Then change the value of "HKLM\SOFTWARE\Palm\Varnish\SpeedDialPlugin\VoiceM ail\Deletable"
to 1 (decimal value)

Then go to the Speedial options
Click on "Voicemail" button to edit it and select a contact with a Photo
Click option for Picture speed dial
Voicemail is now gone, and u are left with only your contact picture speeddials :)

sweet this will work for those of us using the treo speed dial today plugin. Thanks for posting!
~Mike

Removing Speed Dial if you want to use Photo Speed Dial
 

On the Treo 750v, there seems to be an easier way if you use Photo Speed Dial. I simply enter the voice mail number in my own contact record, then select that for the voice mail with my photo, and that removes the button speed dial.