Palm 650 - Manual (Page 224)

212 Section 3D: Messaging
Messaging Tips
ⅷ You can address messages to multiple recipients by separating the addresses
with a comma.
ⅷ When entering a message, you can insert emotive symbols by pressing Center
and selecting emoticons, or insert predefined QuickText phrases by selecting
QuickText and then selecting a phrase. To add a new phrase, select Edit
QuickText from the list.
ⅷ You cannot use all symbols available on your device in your messages. The
Messaging application automatically replaces invalid characters before it
sends messages.
ⅷ You can send and receive text messages even while you are on a phone call.
This is easiest when using the hands-free headset or speakerphone.