If your site is listed our directory, however a screen shot of your site isn't displayed, then your link probably is not indexed at thumbshots.org...

If you only ever submit your website to one other directory, the place to be listed at is the Open Directory Project (http://www.dmoz.org). ...

When you initially submit your link to the directory there is a field titled "From which website did you discover the Photography Directory...

Listings in the Photography Directory Project can be either free, or sponsored.

The advantages of a sponsored...