Signed up a couple of weeks ago, and saw that today's hashpoint is reachable. Will try for it about 3:30 pm. 3/26/12
Reached the Geohash point for 2013-02-23 in 35,-80. Now, I have to figure out how to document this achievement. On vacation now, so this will have to wait.
2015 04 18. Will try for the hashpoint in the Arroyo Seco Wash, by the Rose Bowl.