Know of any good Portland print houses that do big stuff quickly?

http://www.fordgraphics.com/oregon/index.html has always been there for me! Ask for Jerry or Phil in the Color Department. They have a large format printer, but I don't know how wide it prints.

I'll second PhotoCraft.

If you strike out in PDX, http://www.salemblue.com/home.html down the freeway could do it, looks like. They are a first-class outfit.

If Ford doesn't work for you, their arch nemesis, http://www.precisionimages.com/ is a good alternative. (I used to work for 'em doing large format stuff back in the day... )

Any "blueprinter" should be able to handle it. The latest Oce equipment can handle this kind of thing in minutes. Heck, we have a slowpoke HP printer in my office that could spit that out in about 10 minutes. The only tip I have is that you only really need to worry about the 3' dimension, and consider the 5' to be the length. They'll just print it in landscape format. The drawing I'm working off of right this instant is 8' "wide". Perhaps California is ahead of the curve in this though--actual blueprints are dead here for environmental reasons, and the only way you can get any kind of large-format printing done, even for architectural plans, is via digital scanning.

Thanks for the recommendations, I ended up going with http://www.tisgrafx.com/, who were suggested to me by the folks at PhotoCraft. PhotoCraft wanted $350 to print the PDF into a poster and TIS was around a hundred bucks and way simpler and faster. If they don't do a good job, I'll go with Salem Blue from now on since they're closer to me.