Actually they do. Most every blog service has both an import and and export, and even though the resulting XML isn't formatted identically, usually an export from any major service will import successfully into any other major service.
FWIW: I've done imports between blogspot, movable type, and wordpress a number of times with rarely a problem.
I suppose it's sort of diabolically evil of Posterous here. They're really just releasing a feature every other blogging service has had for years, but doing it in a way that's great PR.
FWIW: I've done imports between blogspot, movable type, and wordpress a number of times with rarely a problem.
I suppose it's sort of diabolically evil of Posterous here. They're really just releasing a feature every other blogging service has had for years, but doing it in a way that's great PR.