From Dennis Kucinich’s press secretary:

Congressman Kucinich Will Hold Press Conference to Announce Introduction of Articles of Impeachment Relating To Vice President Richard Cheney

WASHINGTON, D.C. - Congressman Dennis Kucinich (D-OH) will hold a news conference tomorrow afternoon to announce the introduction of articles of impeachment relating to the Vice President of the United States Richard B. Cheney.

Where: Cannon Terrace (intersection of Independence Avenue and New Jersey Avenue)
When: Tuesday, April 24, 2007
Time: 12 p.m.

I think we can expect more news about this soon.