I'm the sort of person who likes to get his grammar just-so and expect it from others as well. Spend entirely too much of my time in office finding (and sometimes laughing) at errors made by co-workers (and in many cases, the topmost managers of my company). But most of all I like to try and figure out how to correct things to make them better. I've written considerably, not just for fanfiction but a number of short-stories on my blog and would consider it an interesting challenge to take a shot at beta-ing for fiction written by others.
f you think I can help you, send me an email explaining what your story's about, how long it is, how quickly you want a reply, and what you're expecting of me. If all you want is a spelling and grammar check, then there's no point in me sending you a list of plot holes.
I'll try not to be rude, but do bear with me.
Do let me know your age and native tongue as well since that will definitely impact the outlook I bring to your story.
For fics that are a work-in-progress it would help considerably if you gave my an brief outline of the plot as it helps in checking for plotline-errors and obviously what happens in the beginning can have a major impact on the rest of the story.
Once you've gone through a story taking my advice into account (and I don't expect you to follow all of it - it's your story - but I do expect you to at least consider it) I'd prefer to see the story again just to give it a quick look over.
I'll try to adhere to a turnaround-time of 36 hours for submissions upto 3,000 words. Beyond that, you'll have to give me at least 72 hours.
Do drop me a line if you want me to beta your fic.