Q1) Has Detective Conan finished?
No

Q2)Has Ran been able to find Conan's real identity?
No

Q3)Has the Black Organization figured out that Shinichi had shrunk into Conan?
No.

Q4) Has Conan been able to get back to his normal size?
No, however he did get back temporarily to his normal size two times in the series.

Q5)What about the Black Organization? Did Conan find anything about them?
Yes, read my Plot Summary Page for details.

Q6)How many episodes of anime has been aired in Japan?
They air an average of 41 episodes per year, that is to say about 3.41 episodes per month. As of the end of 2006, a total of 459 episodes were aired. If t is the time in months starting from 2007, then the answer to your question (in average) is 459 + 3.41 t

Q7) Can I buy the Japanese Manga of Detective Conan?
Yes, there are many online shops that sells Japanese Manga. I recommend www.amazon.co.jp. No matter where you are in the world, you can get them from Japan.

Q8)How do I search for Detective Conan stuff in Japanese sites?
Search for 名探偵コナン, which reads "Meitantei Conan". 

Q9) Who is the boss?
It is thought to be Goro-chan, Eri's cat. See this page to know more about it.