Acetyl-CoA has a number of biochemical roles in the body and I'm curious as to whether anybody knows where I can find at least a semi-comprehensive list (i.e. comprising all the major roles in the human body it serves) of the biochemical reactions in which acetyl-CoA partakes in the human body.
I may be missing some fantastic resource, but my first thought is to send you to KEGG. Is that crazy? Maybe, but a simple search for Acetyl-CoA in humans can give you tons of useful information, including GO terms, enzymes, genes, and, yes, biochemical reactions; just use the KEGG Pathways tool and specify humans (hsa). You can click on each individual pathway for more information, such as the cholinergic synapse.
Metacyc is an excelent methabolic pathways database that includes all kind of organisms. Of course you can search for methabolic compound.
You should look at Lehninger's Principles of Biochemistry. Just search for Acetyl-coa in the index, and you will find it's roles in different aspects of the metabolism.