Hey thanks nickvd for the compliment. Most of the work went into the site, so I'm glad it shows.
And madepablo, it looks like we do have different objectives, but I like your ArduDrop project. I will add a link to in on the GardenBot site (just let me know if this is not okay).
GardenBot is really focused on having simple, step-by-step instructions while being a flexible, extensible modular system so people can try out different setups. And I tried to make sure that charting the data would be easy (since I'm an artist, I like visual data) -- hence the CSV output and web-based charts.