Fed up with downloads and copy of that groovy script ? Feel like you deserve the "bleeding edge" and all that new features I'm talking about ?

Well, if so, let me give you an advice : change your script to replace the local version of posterous.groovy by the online one. As an example, for my very own posterous, command line becomes

https://gist.github.com/482894

PS : Thanks to the StackOverflow community for that one.