For this thing, I explored various photo tools and mashups and had a great of fun doing so.
I used Animoto to create an animated slide show with music using some of my vacation photos to Duluth and the North Shore.
Next stop was Collagr which creates a collage using your Flickr photos. Here's my collage using my vacation photos.
I then tried out CaptionBubble, which adds captions to your photos. Here's one I created:
Create your own caption
I used the Image Mosaic Generator to make a mosaic of smaller pictures using my avatar. Unfortunately, I can't get the picture to upload on here or Flickr, probably because the file is too big.
I played around with some of the tools on Picnik. Here is the "heat map" version of my avatar: