Overview
Simply put, this .NET project (if it will survive the prototyping) is just another lightweight proxy generator. It is supposed to aid development projects that leverage Inversion of Control Container and address multiple cross-cutting concerns.
Update
December 14 2007
It turns out that the approach of having separate DSL logics for automated decorator definition is not just worth it in the complex production systems.
It is much easier to write decorators by hand, than have Boo language processor and the dedicated syntax. Since the primary concept of Photon.NET prototype was based on the Boo manipulation, it seems reasonable to suspend it for now (or at least till C# gets the promised compiler extensibility).
However, all the other ideas established in the Photon.NET (i.e.: exception handling policies, validation rules, unified logging) have proven to be helpful in complex production scenarios. They are being actively developed and leveraged in the successor open source project called Lokad Shared Libraries.