I'm glad to answer any questions about Georgetown. I went in blind - didn't know anyone who had gone to GULC, and it would have been nice to have been able to ask questions.
I don't know much about the 1L job hunt, because I'm an evening student and already work full time during the day. I do know that a fair amount of people got summer firm jobs. That's why your first-semester grades are so damn important.
In terms of what differentiates the great students from the not so great? You know, I'm really not sure. One thing I can tell you for sure: you can NOT judge a person's performance on exams by the quality of their class participation. If anything, the people who talk the most are the least informed (this is a plea to all 0L's to NOT become gunners). I guess the one major differentiator is work ethic. There are plenty of students who treat it as a three-year extension of college - bar every night, IMing during class, etc. Unlike undergrad, your grades in law school mean EVERYTHING. Don't be a jerk and be relaxed, but you do have to take it seriously and study harder than you ever have before.
Thanks for the comments. You do realize this is about to turn into a Gtown question thread. Hopefully you don't mind being charitable. Anyway, what kind of luck do 1Ls have finding summer positions? Also, with Gtown attracting loads of talented and smart students what separates the great ones from the bad and whats separates the marginal from the great??