All the info is on Wikipedia:
General info, including all standings:
http://en.wikipedia.org/wiki/UEFA_Euro_2012
The group pages:
http://en.wikipedia.org/wiki/UEFA_Euro_2012_Group_A
http://en.wikipedia.org/wiki/UEFA_Euro_2012_Group_B
http://en.wikipedia.org/wiki/UEFA_Euro_2012_Group_C
http://en.wikipedia.org/wiki/UEFA_Euro_2012_Group_D
contain an overview of all the "Country X will advance if (..)" conditions. (My favourite is "Russia will also advance to the quarter-finals (..) if they lose to Greece
by fewer than six goals and the Czech Republic draw with Poland."...)