At the bottom is a hint

>Getting started is easy: just ask a question, **answer a question** or, sign up and start building your reputation today.

The Link to *answer a question* links to [Unanswered Questions][1] (ordered by votes).
I would say these are hard questions (since no answer exists at the moment). A new user might be frightened off by these questions thinking he/she can't answer any of them. 

Why not link to the *Newest Questions* instead?

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**Official response:** [meta-tag:status-completed] Now links to newest unanswered questions

  [1]: https://apple.stackexchange.com/unanswered