On 2011-11-03
Pierre announced Spyder 2.1. At that time our Google Code stars counter was at the mark 440. Exactly three months later, a day before 2012-02-03, the counter of Spyder stars achieved number 500. Congratulations!
As Spyder is a scientific IDE, let me calculate that the rate of Spyder adoption is about 500-440 stars/~90 days = 0.66(6) users per day At this speed we are unlikely to hit magic number 555 by the end of PyCon sprints unless somebody will give a lightning talk about it. =)