How can I send an SMS message to a group? I want to send an SMS message to a group of people either in a contact group or maybe selected from a list of contacts.

How can I do that?
Since things vary slightly from UI to UI, this may depend on which phone you have.  For instance, on Stock Droid X (Motoblur) I believe that if you are composing a message, hitting the Menu key will provide the "Add recipient" option.  On Liberty ROM 2 on Droid X, using the stock messaging client, you can simply add users in a message "To" field by separating them with commas.