I got arround to updating my fitness app.
Here's the current version: link
It is still written in Ruby. It uses Sinatra and a simple pstore as persistence layer.
I thought about using redis as the backend like I do for my new blogging engine (sneak peak), but it seemed too much of an overkill for a low traffic personal running log :)

I'll release the new code publicly soon as soon as I refactored it a bit :)