Also, related question- would you consider the old newsgroups world (I guess as filtered through Google Groups such as http://groups.google.com/group/sci.math/t

Also, related question- would you consider the old newsgroups world (I guess as filtered through Google Groups such as http://groups.google.com/group/sci.math/topics http://groups.google.com/group/sci.math/topics ) as still being worth following?