Electoral College Tie Analysis

[True Federalist (진정한 연방 주의자)]

On the split states, is there a chance that something similar to 1800 happens, in which one member doesn't vote, allowing the state to go for one candidate?

Entirely possible, as only a majority of the votes cast is needed for a candidate to win the state (under the 1824 rules, as decided by Congress on February 7th, 1825 [Link]).

That is also what happened in 1801.  Maryland was split 4-4 as was Vermont 1-1 for the first 35 ballots so they were treated as no result.  On the 36th ballot, the Federalists voting for Burr in those States abstained, giving Jefferson the States despite not having a majority of the delegation, but having a majority of the votes cast.

[True Federalist (진정한 연방 주의자)]

Yeah, with a true 269-269 tie, I'd expect several faithless electors to vote for other Presidential and/or Vice Presidential possibilities, though you'd need very heavy defections to make someone other than the two VP nominees eligible.  President Colin Powell or Vice President Byrd perhaps?

[True Federalist (진정한 연방 주의자)]

Since DC has EV's, do we count Elanor Holmes Norton's vote for Obama?

No.  Though it would be possible for Congress to admit D.C. as a State after the election and then allow Columbia's vote to count if it were needed to reach 26 States.

[True Federalist (진정한 연방 주의자)]

The GOP would need to control 26 states. If neither candidate gets 26 votes in the House or the VP selected by the Senate becomes acting president (which of course would be the Dem nominee).

I wouldn't be certain of that.  If this does end up as an EV tie, the Democrats might not gain any seats in the Senate either.  Lieberman might well be a wildcard, especially if McCain gets the PV nod.  After all, he can hardly be blamed for deciding to follow the PV afterwhat happened in 2000.