F1 panjandrums have been working all year on a suitable definition of the term "non-constructor." If they can get that done soon, and then figure out how to split F1 income among constructors and non, then Prodrive will officially join the 2008 F1 circus.
McLaren and Prodrive have recently signed a "detailed commercial agreement." However, it is being held up due to a lawsuit initiated by Spyker (and supported by Williams) that is now in arbitration. Spyker, an independent full constructor, has argued that allocation of income should be different for Toro Rosso and Super Aguri, since they essentially "buy" cars from other teams. The outcome of that will affect this year's income disbursements as well as next year's.
It isn't revealed yet just how much collaboration there will be between McLaren and Spyker on the chassis-engine package. Regardless, one just hopes McLaren will have a better experience with them than Red Bull and Honda have had with their respective "junior" teams.
[Source: Motor Authority]