I think I figured out a way to modify the below algorithm with daily trending twitter hashtags instead of today's date and the opening ticker of the stock market.

Take the top 5 trending hashtags, replace their letters with numbers (where A=1 and Z=26). Next convert that number to a 15 decimal place number followed by zero. Then plug each string into a current lat/long co-ordinate pair and follow the same assignment flow. Voila. New destination geohash :-)