I seem to remember one in the 19th century who became President, then later a Supreme Court Justice...just can't remember who.
2000 was necessary to break the Cherokee curse; every president elected in a year ending in '0' ( starting in 1860, and I think 1840 )died in office. By getting Gore out of the way, we're now free from the effects...
Filmore 1840 (basically died of hypothermia, if I remember correctly)
Lincoln 1860
Garfield 1880
McKinley 1900
Harding 1920 (I think...check me on that...
Roosevelt 1940
Kennedy 1960
Reagan 1980(almost...the curse has been running down. If Lincoln's doctors had treated him, he'd be a goner)
Gore 2000 (but by not serving, he lived to start the Global Warming fight)