The above message protests Sydney, Australia's SMS driven racial incidents in 2005.
Paul Kedrosky's last article for Business 2.0 is about the potential for SMS in North America. It seems that SMS here is underperforming almost every other country in the world -- even Ecuador. Kedrosky writes:

But that doesn't fully explain why users in Ecuador and the Philippines send north of 200 SMS messages a month and the Danes and Irish average 100 a month, while Americans manage to tap out fewer than 50.

Why the difference? In part, it's simply a matter of critical mass, with people adopting SMS because their friends are using it. Look at how fast AIM took off in the 1990s, or MySpace during the past year. When texting gets big in the United States, it will become a mass phenomenon before we know what's hit us.

Is the SMS market an overlooked opportunity for Canadian entrepreneurs? Until the phone interface improves most of us will prefer PC based messaging. When that barrier drops then we will see an explosion in text messaging.