Hi Kat!
I just want to ask, do you get the designer's permission before featuring cards? If not, you might want to consider it.
I've seen other best-of or favorites type blogs, and I know that many people do not appreciate their work being shown without permission.
Just one reason is if a project is picked up for publication, they are required to delete it anywhere that it appears online. If it's all over the place, that's difficult to do. Also, many people have copyright statements posted on their blogs about use of their photos. Your blog isn't posting these along with the pics, kwim?
I'm not trying to be a wet-blanket, honest! You're obviously wanting to be considerate by posting their blog link, but I just want to give you a heads-up that some designers may consider it bad form to use their pics without permission.