Just a reminder from Tech Recipes:

• T-Mobile: phonenumber@tmomail.net
• Virgin Mobile: [phonenumber]@vmobl.com
• Cingular: [phonenumber]@cingularme.com
• Sprint: [phonenumber]@messaging.sprintpcs.com
• Verizon: [phonenumber]@vtext.com
• Nextel: [phonenumber]@messaging.nextel.com

Where, oddly enough, [phonenumber] is the 10-digit phone number.