ReviewsExpand your mobile snapshots to wall-friendly proportions. A 24x36 poster from PosterBrain.com for $15. Select any photo or digital photo (JPG, GIF, PNG, TIF, BMP) that's at least one megapixel and no bigger than 100 megabytes, and get a personalized poster shipped to you, a $30 value.Printed on 200-year archival paper with a sexy satin finish, your poster will arrive ready to hang. The entire process only takes three minutes. Blow up a romantic moment for a personalized Valentine's Day present (free gift wrap is available), or if you're alone for the love-heavy holiday, posterize that secret mobile shot you snapped of your crush from the bus and pretend he or she is there with you. You can buy two of these Groupons.