Dear Soupy, You've certainly got quite a quandary on your hands. Having an offer from either place is a great opportunity, but I'd be happy to highlight some of the more unique aspects of a Palantir internship: We do most of our product management as a distributed task across all of engineering. Rather than the traditional "product management tells engineering to implement this specification", we hand out problems to…
Minor nitpick: I graduated in Dec '09 and came back to Palantir in Jan '10. After working on interesting problems and writing stuff that people not only use, but are willing to pay for, I was hooked. School, by comparison, was a lot less interesting and probably less useful.