We will have mid-term on 25th March. All the topics we have covered until spring-break (i.e, including social networks), will be on midterm.
An example midterm can be found at http://rakaposhi.eas.asu.edu/s07-specimen-exam.pdf
Homework 3 will be due on 18th March. I have added a question on social networks to the homework.
(Please note that the graded homework 3 may not be available by the time of the exam; solutions will however be posted)
Please let me know if you have any questions/concerns.