For example, a member could select to be alerted to private messages on a forum via text message alert. I`m not looking for SMS text messaging advertising, just alerts. Opt in only.
Can these scripts be easily integrated into open-source CMSs like Drupal or Joomla?
Also, is there any infrastructure on my part that needs to be in place to use such an alert system like high-tech gizmometry... transmitters/towers/satellites/lasers? If the infrastructure is handled by someone else, how am I charged? Costly? Or is the alert system purely code based?