| | Verizon SMS
If you are texting Verizon phones, you can get around sending SMS messages...
You send an email to <phone number>@vtext.com (ex. 5551234567 @ vtext.com)
The person receiving the text can reply to the SMS normally, but it will come back to your email account. You can continue the thread that way. Works great for Verizon, but not sure about other carriers.