I posted on my blog about making my first infinity card. There is also a link to a tutorial (with a much nicer card). I'm going to make some more tonight that will hopefully be more beautiful. I was going to wait until tomorrow to show you all the better ones, but if you check it out now you may have time to make Valentine Infinity cards which is what I'm going to do tonight!
Here is a link that might be useful: Infinity card with tutorial link on my blog