donjob:
Instead of waiting for the recruiters to call you, you might consider doing this: (1) contact the showcase organizer to find out which college programs attended, (2) from the showcase organizer's list of attendees, select the ones who genuinely interest you, (3) drop them a short note, telling them of your interest in their program and reminding them that you attended the showcase, (4) enclose a one-page fact sheet similar to the one described in the "Recruiting Tips" section of this website. Later, once your high school schedule is published, send them a copy of it, reminding them of your interest in them.
In any correspondence, if there's any quality in particular about the college team or school that attracts you to them, make sure you mention it. In other words, personalize your correspondence to them to the extent that you can.
Best of luck to you!