xkcd-reader from germany, living in west Hamburg. In times of global warming, I dislike wasting fuel on Geohashing, so I try to get to hashes in range by bike. For your information, as of July 2008, standard fuel (91 ROZ) is 1.55 EUR per Litre ^= 2.53 AUD per Litre ^= 2.45 USD per Litre ^= 9.27 USD per US-Gallon in Germany.
I drew the Bicycle Geohash Award ribbon image myself and converted Randall's Geohashing logo into a vector format image. It is used on the posters I hold being at the hashes and the promotional poster I left in Hamburg.
I adapted Douglas Adams' "Nad": In geohashing, you call it Geonad.
This wxPython powered App alerts me whenever todays geohash is close whilst this one fires at pixels using The Algorithm.
I use Commonist to upload my photos to the wiki. Use "geohashing _ http://wiki.xkcd.com/wgh/api.php" for your "wikis.txt" config file. It's great, much less clicking and copypasta.
Travelling by bike only, my range is:
9.60707 < longitude < 10 53.54037 < latitude < 53.67906
My list of expeditions has it's own page.
My list of achievements now also has it's own page.