New England Conservatory's Career Services page has several useful links. My favorite by far (and which has a free trial period during June 2009 - 5 more days to go look!) is the Bridge Worldwide Connection. Jobs (academic, church and beyond), Fellowships, Competitions - all are listed. It's $55 dollars to join, but highly worth it.
Here is their Opportunities and Resources page - provides great ideas
Music Career Handouts - several are free, the rest are $2 to $3 dollars apiece. They have varying information which look useful - examples: Grants, Teaching, Publicity/Marketing.
Their Music Resource Library has lists of reading suggestions according to subject.
Also - here is YAP, a tracking website for Young Artist Programs. It's mainly for singers, but its a great resource in general about programs, competitions, mainstage opportunities, workshops, and more. Your singer friends will love you when you forward them stuff. It's $60 to join.