SharePoint 2010 SMS Service
Now in SharePoint 2010 is possible to use SMS to alert users, and the best part is easy :)
Enter SharePoint 2010 Central Administration
Than go to System Settings
There you can configure Servers in Farm, Farm Features, Alternate Access Mappings, Farm Solutions and E-Mail and Text Messages (SMS)
The email settings is the same has in SharePoint 2010, but now there is a new link "Configure Mobile Account"
If you need a text message service please click here chosse you country and network and the page will show you a list of providers that you can use.