Button & progress combo

A little something related to an internal project we are working on.

Once the progress goes 100%, the button is enabled (simple, right?)

ps1: It needs work, but I wanted to try Dribbble so, there :)
ps2: Thanks @Antonis Theodorakis for the invitation!

UPDATE: Here's a "live" version by Antonis Kamamis: http://d.pr/KRro