Best app I've seen in a while on HN -- targeted directly at me, lots of geeky features, very cool interface, the video leverages my enthusiasm for tea into a purchase decision, and easy to buy for my iTouch.

Congrats on the great job, siglesias. I'm buying it right now, and I'm looking forward to hearing what kind of market traction you get!

Also, at a meta level, at some point I'd like to learn more about how iPhone app developers manage so much functionality for so little real-estate. There was a lot going on in this app for only 6-10 very simple screens. Did you mock it up on paper first? Wire frame it? Use an online tool? Details here would be interesting.