Okay, so check this out. Just found out about this service called Teleflip. With Teleflip (www.teleflip.com), you can send an SMS to someone from your email, for free. The only way to do this before was to pay per message, which gets pretty expensive, or to know what carrier the customer was on and convert their phone number to the required email address for that service provider.

On LL.com, we currently send SMS messages to people, but users have to register their cell phone's email address with us. For example, 4155675698@sprintpcs.com. With Teleflip, they can now register just their phone number 415-567-5678. Then we send the message to 4155675678@teleflip.com and they get an SMS message on their phone. And if they change carriers, no problem.

Looks like I'm gonna have to do some recoding and data cleanup.