When you open the file, don't worry if the font looks unclear. It doesn't look great on my copy of the PDF file either, but when you print it out, the lettering looks clear and crisp. I think there must be something a bit odd about the way that the font I've used is interacting with the display aspect of Acrobat. But the new fonts I've been trying out on the cover pages are so cute (much better than Comic Sans!), I think it's worth it, since everything prints out OK.
All of the flashcards I've made use the same font, so if you choose to use them, they will all coordinate.
Please let me know if you have any problems, and as always, feel free to send other teacher friends along to the site, if you think they might be able to use these flashcards in their own classes.