According to Paul Kiel at the TPM Cafe:
The best piece of reporting this morning on the Abramoff plea is from the Post. As to how many members of Congress Abramoff will finger, the Post does not equivocate: six. In addition to those six “House and Senate members,” Abramoff “will provide evidence about congressional staffers, Interior Department workers and other executive branch officials, and other lobbyists.”…
The prosecution’s strategy so far seems to be to obtain guilty pleas from lobbyists and staffers in order to prosecute members of Congress….