Whal, I finished building my 4x5 yesterday (albeit with a temporary bellows because my commercially made bellows hasn't cleared Customs yet).
I've got some HP5 and some E100G in the frige, so I guess I'd better load up a couple of holders and jump into these LF waters ;-)
If anybody's interested in camera building, there's some pictures up on my Web site at http://www.geocities.com/diannebest/camera/camera1.html
Don't make fun of the pictures on the Web site! I just got a $100 digital camera - I expect better from my 4x5 ;-)