To make this collage-style guest display, you'll need: a craft punch in any shape you want (I found my bird one at Michael's), a shadowbox frame, paint chips in your wedding colors, and poster-mounting squares or stick-on glue dots (you can get these at any craft store, too).
A note about the paint chips: take way more than you think you'll need. I admit I felt the tiniest bit guilty slipping tons of them into my purse in the middle of Lowe's, in what I hoped was a non-suspicious way, but I did buy some lightbulbs that day. Besides, if I was really going to paint my walls, I'd need that many chips anyway to get a reasonably sized swatch.
Get started by taking that sweet new paper punch to the paint chips. Punch out as many shapes as you have guests, and be creative in your punch placement. Don't disregard the little white part between each color on the strip, for instance. It makes a subtly cool graphic statement. Try to maneuver the punch so the cutouts are close together, which will help you maximize the number of shapes you can get from each paint chip.
Start arranging all of your punched-out shapes inside the frame. I made a grid design, but if your tastes are more towards the abstract, you can scatter them or combine them into one larger shape. Arrange the colors in a pattern, or not. Up to you. For my little flock here, I wanted the yellow birds to stand out among the gray, so I used fewer of them and tried to space them out.
Put this beauty on display at your reception with a few nice pens and let everyone sign and initial a shape. If you can't fit them all into one frame, just double or triple up. They'll make a great gallery. At the very least, you can be sure they won't get stuck on a shelf somewhere.