If you need screenprinting: AWESOME DUDES PRINTING
These guys do great work in Philly. They went on tour with Mumford and Sons doing a mobile screen-printing setup. They do posters, t-shirts, beer coolies, stickers, etc.
Here's some examples:
It's paper. Thick paper. Like card stock thick, color both sides, 8.5x11 or 9x12 size. Lots of em. Gotprint wants about $5.3K after shipping for 45K of them.
I had some ASE 2010 promo materials and also ganged business cards for 8 Wickedfire members, 4 colour offset plus metallic inks, done by these guys and the results were really quite good...