Well, I am a beta reader, but I'm not taking anyone at the moment, nor offer my services here. >_< Primarily because I already beta read many fics in multiple places, and am currently way too busy (lots of tests at school) to be able to commit to more beta reading, when I know I would not be able to do a good job quickly right at this moment.
But I do run the 'Beta Place' - which is basically where you can look at people's profiles who offer their services as beta readers, and some who no doubt would have time to beta read unlike me. Go to this thread, and check out the first post - there's a list of people there. If one interests you, contact them and ask if they want to beta read your fic. :)