sms + cap codes = cokemusic.com
For a long time only habbo had this. It was a great way to get some free credits. But cokemusic.com like always has a new plan for an old idea. They are letting you use sms on your mobile phone to enter codes. Which sounds cool, But the sad part is only those with phones that have sms activated can't use it.

If your bummed out that you don't have a phone that has that or a cell phone at all. I found a great site that has free sms on it. It's http://www.free-sms-messages.com

Unfortunately you won't be able to use it for coke. They want an actual phone number. But I'm working on it;)