What matters is that in the court of world opinion, President Bush has perjured his office.
However, in that venue, nobody is held accountable - although as Americans we should be profoundly concerned that we've been purposely and repeatedly lied to.

For a view from a legal viewpoint - is lying to create a pretext for war an impeachable offense? - check out this law site:

http://writ.news.findlaw.com/dean/20030606.html