atlrus - 2:58 pm on May 23, 2013 (gmt 0)
Panda is sitewide. Penguin is on a per page basis. According to Cutts, Penguin 1.0 was home page only. Penguin 2.0 goes deeper.
I think it's even deeper than that. My observations make it about per page->per keyword, i.e. a page will be penalized for certain keywords, not overall.