I can vouch for the instructions :) I now have a fairly usable planb setup running. There are still some issues regarding the default fonts in Omero (nothing that can't be fixed with a bit of googling and help from Fransisco or John :) I got mine running by creating the Plan 9 Vera fonts from the bitstream Vera set installed on my linux box. It's a fairly straightforward process. Omero does look a lot better with the vera fonts :)
I second the idea of a Wilki for this. Atleast it'll allow people to fix any deficiencies in the instructions and help pool the info on how to get started with Plan B. -Faisal.