I haven’t followed the progress of the Parrot at all, though I know vaguely what is: a multi-language VM. Dan Sugalski was the architect of it, but has left. His Parrot Post-Mortem is a fascinatingly honest account of what went right and what went wrong with the project. It includes technical issues, inter-personal issues, and he’s not afraid to admit to his own failings. It seems like the kind of manifesto that should be used to guide future projects.