I interviewed in the last cut off under the 2007 announcement. Everyone interviewed had over 100. It was a small group, right when the hiring was shifting from DC to MSP. I understand its going lower this time since they are interviewing more peeps for more jobs.
Just for reference, here is my timeline:
applied 6-26-07
interview 11-30-07
job offer 1-15-08
whiz quiz 2-15-08 or so
initial BI 4-08
Start work 7-7-08
FLETC 7-23-08