I have noticed that ICFP has a student volunteer program and research program that accepts undergraduate students and POPL have the Programming Language Mentoring Workshop, so I was wondering if there are any other conferences with similar programs within TCS?
Also, would it be very likely that an undergraduate student would get any funding for these programs, as I am assuming the organisers would prefer postgraduate students? I would be very interested in attending the PLMW at POPL but as it's in India next year, it would be hard to self fund...
Edit: Thanks for the suggestions, I have checked some of them out, but I should have probably added that I am in the UK, so some of them would be quite far, but I know of a couple of similar undergraduate conferences to the ones mentioned by vzn so I will consider that route too...