I better publish soon...

Because Gott's version of the Doomsday Argument has been updated to something near to mine, and has even been discussed in the New York Times.

Briefly, Gott's version hypothesizes that there is a 95% confidence level that we are in the middle 95% of the lifespan of any phenomenon we randomly observe. Manned spaceflight began 46 years ago, so Gott reasons there's a 50% chance it will end within 46 more years, and uses this as an explanation of the Fermi Paradox - we don't observe other alien civilizations because they never left their home planet. So Gott believes we need to colonize Mars, sooner rather than later, if we want humanity to have a long future.
My argument is a bit more sophisticated, but largely agrees with Gott's. More to come...