Been fun thinking about making games :) Imagine if we end up with a pretty cool system that's fun, then we could do like different themed sets that use a modified version of those same rules. Then do a kickstarter to make some dough to print them up ;).
There's a site called Artscow where you can have them print custom card decks. On BGG there's a bunch of games that use that service that look interesting. You basically create an image gallery of your cards, then people buy that set. Think it'd be cool for some protype decks or something (although regular printer paper would do the trick too, huh) but in the end, you'd prolly wanna use a real printer and get bulk prices.
Artscow has a sale right now (until 7-7-11) that if you use code 299PLYCRD at checkout, you can get a custom deck shipped free for $2.99. Only works for the regular decks (so basically ones with 1 customized side, other side generic) but there's some games people made using that. I grabbed a Decktet deck, mostly to check the quality. Decktet I guess is made in a way that you can play a bunch of different games with them. Looks neat. :) So you got a couple days to snag one up too. Here's their artscow link: LINK