I’ve occasionally tried my hand at creating holiday cards, but never anything particularly inspired, somehow.
Then during Rosh Hashanah services this year, I managed to remember that the Thing I Do is play around with text, especially Biblical or liturgical text… and there’s no shortage of great material in the High Holiday liturgy. Which excited me, even if it results in a bit of a departure from your basic apples-and-honey “good and sweet year” greeting card motif.
So here’s the first one:

This famous liturgical passage is from the central U’netaneh Tokef section of the Rosh Hashanah Musaf prayer service. Click to enlarge.
I have a few more passages still in mind to work up. Next year I intend to actually get some of them printed up in time to use for the holiday… so I made sure to use up the last few mundane ones in my stash this year.
Edited to add (2015): Buy it on Zazzle!
Ketivah v’chatimah tovah: May you all be written and sealed for a good year.
Lovely!