At the Apple Store, can't beat these:

iPod shuffle - originally $79 is now only $49 and is still eligible for free shipping. (Canada - originally $89 is now only $55 w/ free shipping)
Refurbished iPod shuffle – originally $49 is now only $39 w/ free shipping, dependant on stock inventory. (Canada – originally $55 is now only $45 w/ free shipping)