Hey, thanks for your comment! I coded the geohash implementation from scratch, and it was really easy!

The main reason I did it (other than a fun weekend project) was to make other people interested in it, and enable them to build something fun, very quickly. There wasn't a free+modern+easy-to-use-in-bulk API available, and this way me and others can spend their weekend/hackathons building something on top of geohashes instead of wrestling with the algorithm itself.

Edit : as a greek, I really dig your username :P