Here is a link to that very blog, and also here is a link to an archive of the Design of the Day picks prior to yesterday.
On another note about cards, World Card Making Day is coming up on October 1st. :) I think the World Card Making Day website is geared more towards paper-pieced and hand-made cards, but one can still get a lot of good ideas there. ;)
AND...since I did make this post all about cards, I would be remiss if I didn't share a couple with you. These are two very recent cards of mine that were approved by GCU. The first celebrates getting braces on, and the second celebrates getting braces off.