>Certifications from Microsoft in programming
>Member of Mensa , NY
You probably want to skip these since you are applying to MBA school, not engineering school.
For Excurr, you probably need to start something, rather than working with some firms, this will increase your chances for those schools.
Also, You should refrain from saying much of your UG interns and UG ExCurr activities since its the recent WE that counts the most. How is the job progression with your current job at the hedge fund? This is the most determine factor, don't look back to College years.