Take a look at this
NOTAM Info website which has also been an output of the work the Mike, Russell (Rustle) and Rod Bailes-Brown and others have completed so far. It is well worth a read. It explains the NOTAM process from originator to PIB, the history of the issues, current work and also talks a bit about future work planned in pursuit of greater understanding and access to Pre-Flight Information Bulletins for all GA.