There's a brand new resource for young conductors called "All the conducting masterclasses" that everyone should check out! It is remarkably regularly updated and full of interesting information about upcoming masterclasses, auditions and competitions. I wanted to make a page like this myself but luckily someone else has decided to devote all his waking hours to looking up new masterclasses in the Internet... Please check it out and leave comments - comments are the coffee and cigarettes of all the blog writers!