"Creating a journal in iPhoto is like crafting a scrapbook page that you can post live on the web for anyone to see, for free. Not only is it fun to design a journal, but it’s a super-fast way to show off vacation pics, or to show distant relatives how much the kids have grown. In addition to creating a journal on an iPad, you can also make one on an iPhone in the same way. The feature is currently missing from the Mac version of iPhoto, however."
Via John Evans