Hi, if you are looking for software, you can order cd (free) or download Teradata Express Edition 12.0 for windows from: http://www.teradata.com/express
It's a free developer version and comes with User Documentation. Teradata Express Edition 12.0 is a 2-year license for development, evaluation and training purposes. Teradata Express Edition 12.0 is not licensed for production use. User data is limited to 4 GB.
For learning guides/books, other members might provide suggestions.
Teradata 13.0 is around the corner and will be released in the Q2 of 2009. The next certification track after V2R5 is for TD13 and will be available in Q4 2009.