http://gsak.net/board/index.php?showtopic=13711
I've found 100+ caches in a single day more than once.
The first time was 152 finds in 15 hours, the second time was 192 finds in 14 hours (of which 141 of them were in 4.6 hours)
http://www.geocaching.com/profile/?guid ... ce7337cb93