In case anyone else is wondering what's up with all the 3.9 Miku pics:

"As of an hour ago in my timezone it is March 9th, 3/9, in other words Miku day. 3-9 in Japanese can be read as 'mi-ku.' It can also be read as 'san-kyuu' ie 'thank you.'”

http://ethicalreviews.org/%E3%80%90hatsune-miku%E3%80%91-hajimete-no-oto-happy-39s-giving-day-2011/