Command Line!

awk '/in_reply_to_screen_name/ { print $3 }' tweets.json | sed 's/[","]//g' | sort | uniq -c | sort | grep -v BryantD | tail -20
  56 graphxgrrl
  57 patrickoduffy
  58 jessnevins
  59 othergretchen
  60 GlobeChadFinn
  61 ryantomorrow
  65 smakofsky
  66 seclectech
  69 multiplexer
  73 gentlyepigrams
  75 rmd1023
  76 mgrasso
  79 JimHenleyMusic
  79 Wolf_six
  89 carlrigney
 102 _r_o_n_e_
 107 rone_____1
 129 emilytheslayer
 306 rdonoghue
 341 ce_murphy