idea for iPhone/Android widget : iEarn : how much money youve earnt hr/day/month/yr

came to me today and idea for an app.

You set an hourly rate (contractor) or your annual leave , yr wages etc.
Then the widget displays your accumulated earnings for hr/day/month/yr , whatever you like...
which increment by the second

iEarn
iEarnt
iWage

notifications for

tax limits hit
items you could have bought with todays/weeks wages link to web
% targets to item you want "you are 20% towards a Ferrari 456" lol