Different than I recall the conversation but it is still a unique and scary item to be had. An interesting plot, should the players try to infiltrate a new cult using this and see it work, how then would they react to seeing someone they know on its grill? A mad dash to save them and a large fight ensues in the midst of a few dozen cultist. Fun times.
I've always been fascinated with the idea, almost universal in primitive cultures, that the consumption flesh is a means of power. This is an excellent example of how to take such a belief and turn it into something even more awesome.
Besides that, this is just some plain ol' good writing. Considering the title and subject, this post could have been a lot sillier (not that that would necessarily be a bad thing,) but despite being slightly more serious and usable, it's still pretty danged funny, and that opening prose was a good read.
Unique and refreshing, something I can see useful in my next Shadowrun campaign. For a more oriental/chi based approach one coudl also have it impart a certain amount of feminime/masculine chi energy to the consumer as well depending on the gender, and mental disipline of the victim.
Perhaps inheriting (temporarily) a small amount of skill the entree possessed in life would add another layer of use and appeal to the grill as well, beyond simple attribute improvement? (Of course to glean skill one may need to consume the prepared body parts used in performing said skill, biceps/pecs for swordmanship or blacksmithing, fingers for lockpcking, the tongue for spell weaving, etc..)
Less enthusiastic than Cheka, I must criticize - there are several gods that are just... templates. The Crafter, the Wren musician, barbarian river and storm god. What's new in those? What about the goddess that's simply a non-descript mother to other gods? Does she deserve her own 30-entry?
Also, consider always when making a pantheon: will it cover all the divine roles said culture needs to fill? If not, something's missing.
On the bright side, some like the Unnamed God who fights himself and all others too is brilliant. Caylin the Moon is also a beautiful idea. Make more on the level of those!