A group of female Twitter execs and alums has joined up to invest in and advise startups

A group of current and former Twitter employees have banded together to invest in startups and offer advice to them. The unusual thing? They're all women.  The group is called #Angels and although they're not specifically catering to female founders, they could provide a unique sounding board to companies run by women in the traditionally male tech industry. Female founders face all kinds of challenges men seldom face, from subtle hints that they aren't really serious about running a big busine...