I've been searching for other members of the WIE and physics education networks on twitter. So far I have yet to find any of my fellow education students but I have found some other lecturers that I know and some passionate teachers, and lots of physics-based companies who are related to education, like the IOP, who are very useful to know in terms of public engagement.
next step is to look and see if the linkedin and academia.edu friends are also on twitter. Made somewhat harder by twitter refusing to connect to my google account and search my email address book as it it 'over capacity'. However, it is always over capacity, leading me to think it just doesn't like me1 ;P