I think it's a great idea to release the how to's a little while after the mod release - mostly because it would be great to release the whole lot at the same time (here is every room explained on these pages - instead of releasing them in cribs and drabs), so it would be good to give everyone a couple of weeks to write them.
My personal preference is to put these write-ps up on the wiki, it's exactly the sort of thing it was made for. If anyone isn't comfortable editing the Wiki directly, I'm happy to do the leg work of converting a doc to the wiki. We could put the mod source up there too, although - that would probably be better living on the Nexus.
Re: Publicity, it probably makes sense to release some screenshots and general news tidbits when we start to beta test the completed dungeon. We'll have the whole lot put together then so the screenshots will be accurate and we'll know roughly how long it will then take to publish.
Very excited to add my room, the Chamber of Morpheus
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Some pretty amazing stuff in there. I got all intimidated 
