Statscan releases the lastest data on academic salaries.
This was quite interesting, since it's broken down by university. The median full professor without senior administrative duties (not including medical/dental fields) earns $102,300 annually. However, this qualification is more difficult to reach at MUN than a lot of places, I think. Most departments are only about 1/3 full professors.
Memorial is actually pretty competitive salary-wise, especially when you consider the cost of living in Newfoundland.