Copy some of the functionality of python's progressbar module to Go.
(http://code.google.com/p/python-progressbar/)

Usage:

p := NewProgressBar(100)
p.Start()
var i int64
for i = 0; i < 100; i++ {
	//Do Something slow
	p.Update(i+1)
}

Progressbars can be customised with a variety of widgets

(I am still learning with Go)