There were almost a hundred thousand new members registered on bitcointalk in November this year. During November last year it was closer to ten thousand new members registered. When it's a million new members a month bitcoin will be going mainstream.
Can you please provide a link where I can see new joiners ? Thanks in advance.
Go to the bottom of this page for the monthly statistics. Expand any month you want to see the weekly new member registration statistics for.
https://bitcointalk.org/index.php?action=stats
You'll know it's mainstream when no one feels the need to join a forum about it. How many Android users are members of Android forums?