Imagine a room with 1000 tiny monkeys with 1000 huge typewriters. Now imagine hundreds upon thousands of those rooms, pushed together more tightly than any architect could possibly conceive. Now imagine a single head monkey to lead them all - sorting, filing, and publishing the work of the many monkeys and many typewriters. That monkey is the Alphachimp, and he welcomes you to Wikipedia.
I'm an administrator and I'm here to improve your experience reading and editing Wikipedia. You can contact me here or by email. Either way, if your question is reasonable, I'll probably respond.
In the interest of full disclosure, I have four active accounts on English Wikipedia:
Update as of March 2008: I haven't been as active over the last year due to a variety of events in my life. Nothing's wrong, and I hope to become more active in the near future. :)