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Sandro Saitta
recently
interviewed Rob Hyndman
about CrossValidated.
... DMR: What is Cross Validated and how does it help in your work?
RH: Cross Validated is a website where people can ask and answer questions about statistical topics. The site is part of the Stack Exchange network of sites, all of which are free community-driven expert Q&A sites around particular topics. We [community members] interpret statistics quite broadly- the site is intended for statisticians, data miners, and anyone else doing data analysis.
... One of the nice things about CV, and other Stack Exchange sites, is that the good answers get voted up and it is easy to see what the community regards as the best answer. You can also see which of the people answering has established a reputation for providing helpful advice, based on their reputation scores. It is also extremely easy to find answers to past questions. This sets it apart from email lists and forums where you have to search through badly formatted archives. Everything is tagged and searchable, and (as of 5 October 2011) there are more than 5300 questions and more than 10000 answers that provide a repository of useful knowledge which is freely available.
Read more and visit Cross Validated.
Here is CrossValidated best answer to
What is your favorite "data analysis" cartoon?
(from xkcd.com)