Thanks for all the responses. Believe me, I am not trying to crowd my summer with too many things to do. The reason I am interested in this is that I already work as an RA in a chemistry lab, but I will be moving across the country next summer or fall to start med school, and I'm interested in heading out a little early just to get my bearings. I like doing research, but the lab where I currently work is pretty crazy. My boss is weird and I'm not learning that much by working there, so I thought that if I could line up a different research job for the summer, in my new city, well, that would be the best of everything. Either way I have to stay employed til school starts. Now if it was just summer research vs. vacation, that would be a different story!
Zondeare--how did you find your mentor? I've thought of contacting people whose labs I'd like to work in, but that seems pretty random and out of the blue. Are people receptive to that? Did you have contacts at the place where you did your summer research? I definitely understand the importance of working with someone who's supportive!
Thanks again!