2008: First truly open race since 1952?

Apropos of absolutely nothing, assuming that Vice President Cheney serves a full 2nd term, the 2008 presidential race will be the first time since 1952 that the race for president includes neither an incumbent nor a sitting Vice President. I have not seen this noted anywhere in the blogosphere, so here are the details:

1952 - Eisenhower v. Stevenson (completely open race - neither candidate was President or VP at the time)
1956 - Eisenhower re-elected
1960 - incumbent VP Nixon loses to Kennedy
1964 - Johnson "re"-elected
1968 - incumbent VP Humphrey loses to Nixon
1972 - Nixon re-elected
1976 - incumbent President Ford loses to Carter
1980 - incumbent Carter loses to Reagan
1988 - incumbent VP Bush defeats Dukakis (first sitting VP to win since Martin Van Buren in 1836)
1992 - incumbent President Bush loses to Clinton
1996 - Clinton re-elected
2000 - incumbent VP Gore loses to Bush
2004 - Bush re-elected
2008 - no incumbent (neither President nor VP) running....