Comiqs
Comiqs isn't a one-of-a-kind service as there are others out there that allow you to make comic strips from your own photos, but it is definitely worth checking out...
First you'll need to sign up, which is free. Then upload your photos adding little details, such as speech bubbles. Make as many comic strips as you'd like. Use one photo or several photos in a sequence. There are also various effects you can choose from to make what Comiqs calls the "comic story" more interesting. The Comiqs editor is easy to use even for the non-techie.
Something similar
Comeeko
Create comic strips using your own photos. Easy and free!
Two great services in one
FotoLand
Google Maps meets Flickr for an around-the-world tour of photos!
NOT TO BE MISSED
Web Meetings Personal ads from all over the world, with heaps of photo ads to choose from.