Dear college2007 : Please read through the data on Page 35 of the BC Fact Book.
http://www.bc.edu/publications/factb..._fact_book.pdf
There, you will see that BC accepted 166 applications from a transfer pool of 1803 in calendar year 2008 for an acceptance rate of 9%. From those accepted, 78 enrolled for a 47% yield and a 4% net from the applicant pool.
The challenge for your application process will be to prove that you are among the most desirable candidates from the pool. This is typically done through academic achievement at your previous undergraduate campus. Excuting a transfer in the junior year is certainly not a common application attribute, particularly in pursuing a business degree. As a junior, you are right now 17 months or so away from graduation. We would suggest finishing your degree where you are right now and then consider more carefully what your graduate business school options might be. Good luck.