If you've got a bunch of pictures from a special occasion, then you might want to do more than share them on Facebook. Using Google's free Picasa editor (a favourite among Lifehacker readers), you can easily create a life poster with the best images.
At Project Woman, blogger Helen Bradley outlines how to use Picasas's Collage feature to build a life poster (a concept first popularised by Apple's iLife package). As she points out, square images tend to produce better results; you can either crop them yourself or let Picasa handle that automatically. We've detailed a similar strategy using Irfanview in the past, but as several commenters on that post noted, Picasa does automate the process much more effectively.
Cool Photo Apps #3 Create a life poster [Project Woman]