The chart from Google Analytics shows the number of referrals from images.google.com for this blog:
... and here are some results from Google Image Search:
The images uploaded from Blogger's interface are hosted at Picasa Web Albums, but they're also available at subdomains like bpX.blogger.com, where X is a digit. Another Blogger oddity, inherited from Picasa Web, is that you can't directly link to an image (if you click on a link to one of the two images uploaded above, you'll see a dialog that asks you to download the image). Blogger even has a workaround for this silly restriction: it automatically creates web pages that include the pictures (here's a link to the same image, but this time the image is included in a web page).
Images uploaded before August last year, when Blogger launched the latest major upgrade, are still not crawlable.