VAMPIRINA's illustrator LeUyen Pham and I made ours together. She put up some sketches and some of her news (like being selected for the Society of Illustrators show) and I put up book launch pics, reviews, photographs of events, etc.
It's pretty low-key. I don't want to bombard people. I think (though I'm not sure) that most of the people who follow it are either her friends or my friends.