As of 11/28/2011, 51 ScanImage users and 21 Ephus users have been self-identified via the ongoing user survey, including both current users and those definitely planning to use/try ScanImage/Ephus in 2011-2012.
You can see highlights of the survey below and/or browse the detailed results (live updated).
Lab Profiles
ScanImage Usage, by Lab
# Current Rigs: 80 (1.54/lab)
# Current Users: 149 (2.87/lab)
# Planned New Rigs (2011-2012): 18
# Planned New Rigs (2011-2012): 33
Ephus Usage, by Lab
# Current Rigs: 33 (1.83/lab)
# Current Users: 42 (2.33/lab)
# Planned New Rigs (2011-2012): 14
# Planned New Rigs (2011-2012): 19