Kucinich introduced a resolution calling for Cheney's impeachment this spring. Since then the bill has gained more than a dozen co-sponsors, but it seems to be dying a slow death in the House Judiciary Committee. It's chairman, John Conyers, has stood with Pelosi in refusing to debate the impeachment resolution or bring it to the House floor for a vote.
Apparently Kucinich plans to have another go at impeaching Cheney using privileged measures. Privileged measures are explained here, and looky here, it's something the Republicans have already laid the groundwork for, carefully researching the idea back when they impeached President Clinton.
That would be cool, if we managed to impeach a Republican using the Republicans' own background work.