Yes, tons. Any attending you meet who publishes a lot and has projects going -- approach him/her and ask to get involved. Lather, rinse, repeat.
Probably not a lot of time for more involved basic science stuff, though many do manage it somehow, but a TON of clinical papers to be had. I promise you any attending who's been around for any length of time has a number of cases and ideas for projects just waiting for an eager student.
All that said, maybe wait a little until you get your feet wet and get comfortable with how clerkships work at your school, how much time they need, etc. I'm a big proponent of keeping priorities straight, and pubs really only help if they are accompanied by an otherwise strong application. Last thing you want is subpar grades and boards alongside otherwise nice pubs, because unfortunately, the numbers get looked at first. If you've made it this far you already know that, but it's worth repeating.