Sending update letters?

I interviewed at one of my top choices in early October, and they don't release decisions until early February. I don't really have any updates to provide them with (no new pubs or conferences), but I'm wondering if it's customary to send a letter of interest to let them know I'm still very interested in attending their school. I'm slightly concerned about them forgetting about me lol
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Physician Scientists Source Type: forums