Ok so there's an anatomy challenge on cgtalk at the moment.
Rebecca Kimmel, one of the greatest moderators known to man, is running a challenge to draw a whopping 50 heads in one month. All from master works!
Should be fantastic learning. Though it is almost two a day! SHEESH!
Well i did the first one today.
If you wanna see the thread heres the URL: http://forums.cgsociety.org/showthread.php?t=375031&page=1&pp=15
here's my first, from ref Image #047

DAVID d'Angers Sorrow 1811 Plaster, height 55 cm Private collection