These guys look like the understand the implications
http://www.rpifs.com/offshoretax/otpfic.htm
Here is a discussion on Canadian stock
http://www.assetprotectioncorp.com/taxonforeignstock.html
Here is a CPA forum. Be careful they tend to be overly cautious
http://www.accountantforums.com/foreign-stock-taxation-t12474.html
http://www.cdnbusinessdirectory.com/taxes/33800-foreign-stock-taxation
Here are two that discusses a retirement platform
http://www.cdnbusinessdirectory.com/financial-planning/41696-foreign-stock-ira-taxation-issue
http://www.beansmart.com/financial/Foreign-Stock-in-IRA-Taxation-Issue-2623-.htm