Poli Sci major / Sociology Minor 98-02 (in the states) and I've worked in development and admin in a couple of large non-profit's for the past 4 years.
I think that the key to Poli Sci is it's not that you have that concentration, it's how you apply it. Almost anything can be construed in a political context so you use your background in political science more to bolster exterior interests rather than letting it be it's own end.
That being said, I grew tired and being a social theorist and not a politician, I am endevouring to leave the "real" world and am now going to the UK to go to grad school in Politics (theory). So don't rule out more schooling either in the paradigm or using it (Poli Sci BA) as a spring board into further education (MBA, Law, various management masters degrees, gunsmithing, clown college... whatever floats your intellectual boat).
I have had many friends who went into the political sector as lobbyists, campaign managers, polling and research workers, etc., so those jobs are certainly out there (in the U.S.) but it's a lot of work, can be completely thankless. All but one of my friends who started out on this route remains doing the same kind of work.
So I assume there is a reason you became a Poli Sci major and why it peeked your interests and that is perhaps the best guide to follow. If you wish to be involved with the system itself, work in government or policy making, work as an unelected civic leader, act as a social leader, apply your skills in the corporate world, continue your education, work for X cause, etc., it's all perfectly accessable with your diploma. There is perhaps no misstep to be weary of aside from not abiding to your own will.
