Tableau Desktop is based on breakthrough technology from Stanford University that lets you drag & drop to analyze data. You can connect to data in a few clicks, then visualize and create interactive dashboards with a few more.
Tableau’s Technical Support Service is automatically included with license purchase for one year.
Support ticket: http://www.tableausoftware.com/support/request
After one year the maintenance to install updates expires. Tableau will contact you directly to find out if you would like to purchase this renewal. This maintenance renewal is $150 each year. This is not required to run the version of the software distributed to you and you should only purchase if you wish to upgrade your software on your own.
Training and Tutorials: http://www.tableausoftware.com/learn/training.