It runs well on Windows and I've heard that it works in *nix as well.
Second - I clicked the activation link and when I went to my dashboard the default state was 'disabled'. You might want to make that 'enabled'.
Good luck!
I'm assuming you're managin the price of bitcoin over various averages throughout the day -- it would be nice if I could set alert-points (ex. Email me if Bitcoin drops below $500), and if you covered other coins
Currently I'm making use of the data provided by BitcoinAverage, because the market is shared between a few exchanges.
In the future I may implement custom alerts, but I don't see them as a very interesting feature. What I'm working on is on a system that actually detects itself when there's the chance of a substantial decrease in value.
I often keep track of bitcoin precisely because I'm thinking "if it ever drops to $500 or less than $500, I'll definitely buy". If the point of your app is to save people the trouble of constantly checking averages, it would be nice to set their minds at ease that if the price they're ever looking for comes up, they can react