I'm sure you've seen the sucker-holding valentines that took the internet by storm for the last three years (find the originals here). Well, this is the same concept, only with Lego minifigs. We're huge Harry Potter fans around here (there's a Lego Harry Potter birthday party in the planning stages over here), so we went with a Potter theme this year.
You could do this yourself with any minifig or other poseable action figure. Just pose them with their arm outstretched, snap a picture, and add text.
Or you could just use mine.
Free Harry Potter font found here. The Lego backdrop for these is just Lego scrapbooking paper, found at Joann's. I had these printed as 4x6 photos for nine cents a piece.