In Canada, one of the better ways to look up fund Betas is to use Globefund. Specifically you would want to look up a "fund profile". It basically covers the universe of mutual funds in Canada.

Here is a link to a fund profile for AIC Advantage Fund. You can see it’s 3 year Beta is 0.8. Note that the average fund in it’s group has a Beta of 0.76 – and remember a lower Beta means lower volatility.

In the states you can look up Betas for over 17,000 funds using Morningstar. (Morningstar is also available in Canada). When you look up a fund snapshot, click on the navigation menu on the left under "Risk Measures" and you will find the Beta information. Click here to see a sample Beta reading for a US Mutual Fund.