This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
There is a fairly well known principle called the Law of Demeter which spells out the best practices for using this kind of multi-level access. In short: don't. If you find yourself using multiple dots in an expression, it's a clue that the code you're writing belongs in some other class.