1.The quality and quantity of SnIa data probing
the
expansion history of the universe
is improving very
rapidly.
2.The quality of fit of any H(z)-w(z) ansatz can be easily tested using existing data.
3.
3.Current data favor
4. There are
indications that
ie the gravitational
attraction of dark energy may become stronger than that of matter at . This could imply an oscillating behavior of w(z) between antigravity and hypergravity.