I think Rondo going to abuse the Lakers due to their overall matchup problems.
IE - If Kobe sits on Rondo, do the Lakers really trust Fisher on Ray Ray?? I think Fisher plays Rondo, hoping that Bynum will do a number on the Celtics in the paint, using his length to block shots. In the same sense, Rasheed Wallace I think will be crucial in this series, to "spread" the defense and keep a shot blocker like Bynum out of the paint.
It will certainly be interesting to see how the matchups play out, it'll be like a chess match.