You know, you can actually use your no-name undergrad school to your advantage. Here, read this little interviewing story of mine....
When I interviewed at the IVY's... I always somehow managed to bring up, on my own, the fact that I came from michigan state. At one ivy school i interviewed at, it was really funny 'cuz when you started the day, they had a place where you signed in and next to your name was your undergraduate institution. So it was like 12 people that day... and in my interview day the undergrad institutions being represented were, no joke something along the lines of "Yale Yale, Duke, Princeton, Harvard, Harvard, William and Marry, Cornell, Columbia, Michigan." And here's the rub... notice I wrote "Michigan"... well, as you all know, "Michigan" (i.e. the University of Michigan) is INDEED a very prestigious school... unlike Michigan State (where I go, but still love and wouldn't change a thing in retrospect). Well anyway, all these schools were typed out in Nice letters... except for the place by my name "Michigan" which was CROSSED OUT IN RED PEN, and HAND-WRITTEN (not that neatly, mind you!) "Michigan State." Apparently, the secretary or whomever must have noticed the mistake at the last minute, and felt inclined to fix the error by hand! Needless to say, this didn't help my normal interview-day anxiety (i.e. being self-conscious compared to the geniouses and amazing people I was interviewing with that day).
SOOOOOOO, at my interview, I was asked "How is your impression of our school" and I said "Well, to tell you the truth, I was nervous coming because I'm from Michigan State and this is such a prestigious institution... and then I come to sign my name and the phobia was exacerbated!" haha, in the end, basically, I made a joke out of it... and the interview went fantastic and I actually got in.
I tell them at the interview how it was... I come from a working class, poor family, and I went to a really bad high school... but managed to work myself up and explain how much michigan state was great for me and my development given my situation, finances, etc. It really won't hurt you! Again, I also have LOWER than average MCAT scores than virtually all the top schools, and my GPA is good, 3.8, but it's also from Michigan State... so it certainly isn't something that differentiates me. It really was the extracurriculars, my life experiences, and I think the time I put into my secondaries and personal statement which has helped me!
the moral of the story, be proud of what you have accomplished up to now, and just use it as a stepping stone and follow your dreams!
good luck
kreno