With only one summer of research you might want to save some money by not applying to the top research schools, but your numbers are good enough to give you a shot just about anywhere except maybe WashU. Research begun after you apply won't help much.
Your clinical experience is on the weak side. Isn't there a nursing home near school where you could get some more hours before you apply (assuming you're applying June 2010)? Your shadowing is fine. The leadership looks good. Do you have any hobbies, teaching, nonmedical community service? Are you thinking of beefing up your application for another year before applying?