Hi, I'm Juliancolton (talk · contribs). I'd like to personally welcome you and thank you for your contributions thus far. As you probably know, Wikipedia is a free encyclopedia collaboratively written entirely by volunteers. If you ever see anything that can be improved—be it correcting a typo or writing a new article—feel free to fix it yourself! Don't worry about making mistakes; one of the many editors will probably notice and quickly correct it. If you have any questions, just place the text {{helpme}} on your talk page, and an administrator will help you shortly. Alternatively, you could join the #wikipedia-en-help IRC channel, where dozens of friendly helpers await. You can find out more about the project here, but I won't bore you with statistics and rules. Just remember to be civil to other editors, to always cite your sources, and to write articles from a neutral point of view, and you should be good to go.
Wikipedia is a huge website; with nearly 3 million articles, it is the single biggest encyclopedia in the world. Additionally, there are thousands of policy and process pages, so it can be a bit overwhelming, even to experienced users. When I was new, I found the Tutorial particularly helpful. You might also want to check out the glossary. The Reference Desk serves as our library reference desk, where you can ask nearly any question imaginable.
The Featured Articles and Good Article pages are good places to look for some of our most well-written and comprehensive articles. On the other end of the spectrum, we have thousands of articles that require cleanup of some sort, so feel free to help out.
I hope you've found this advice helpful. Feel free to contact me for more information. –Juliancolton | Talk 13:55, 5 September 2009 (UTC)