How long can she talk about phonebooks you say? Until I get the answers I say.
So luckily for us, Al from the dambrots sent me this picture:

Yes, that is #6 of 250 signed and numbered CEREBUS phonebook. Lets take a look at history shall we, you can play along at home by grabbing your CEREBUS, HIGH SOCIETY and CHURCH & STATE I phonebooks from your bookshelves. Open them up to the title page and then flip it over so you can see the small little print:
June 1986: First printing HIGH SOCIETY
June 1987: First printing CHURCH & STATE I
August 1987: First printing CEREBUS
July 1988: First & 2nd printing CHURCH & STATE II, with the first printing being a limited, signed & numbered edition
January 1990: 2nd printing, CEREBUS
October 1990: First & 2nd printing JAKA’S STORY, with the first printing being a limited, signed & numbered edition
I only have first editions of HIGH SOCIETY & C&S I, so I don’t know when the 2nd printing of those came out. . .anyone? Anyone?
The first edition of HIGH SOCIETY I have is not signed nor numbered, and when I was looking through back issues, I don’t remember seeing any reference to a signed / numbered edition. But at the same time, I don’t remember seeing anything for neither C&S I nor CEREBUS. . .and well, we see how that ended.
But now we know C&S I has a signed / numbered but not limited first printing, CEREBUS has a signed / numbered but not limited first printing, and with C & S II Dave went with the signed / numbered limited edition for the first printing and a 2nd printing pretty much at the same time.
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For those that haven’t seen all the Cerebus related goodies out there on the market right now:
Map of Estarcion: For sale on eBay is a huge, 26″ x 57″ map of Estarcion made by Jeff Tundis. Here is Dave standing with one at SPACE in 2007:

(more pictures of the map in this flickr set)
Cerebus tee-shirts: Poetic Licensing is offering several new Cerebus tee-shirts, one has completely new art work by Dave Sim, and the other three have the covers to issues # 1 – 3. Eventually they’ll be offering tee-shirts for all the issues.
Cerebus Companion: Not really for sale. This is Jerry Sweet’s epic work from 1991, 130 pages about the first 5 phonebooks, all in one large PDF, 18.3 MB, here, free! Yes, FREE! w00t!:
http://www.cerebusfangirl.com/uploads/cerebuscompanion.pdf