Lollychops has a video tutorial up on how to add a crocheted border to paper and fabric. I've actually tried this before with felt and found it really difficult so maybe I'll have to give her method a try! Shown below is one of her photos. There are lots more examples shown here.
The first of Rebecca Sower's recent "Red Thread Series" can be seen here. One of her photos is shown below.
Mary Ann Moss tells some of her tricks for art journaling using Photoshop CS here to merge digital photos and frames. See one photo of her art journal below.