Here is an important article in the Chronicle of Philanthropy outlining an initiative to try and have charities electronically file their annual returns in the US and have this information more easily accessible online at no charge.  Although Canadian charities cannot file their T3010s online they are put online by CRA and available in electronic format for anyone to search at no charge.

Congress Urged to Require Charities to File 990s Online
http://philanthropy.com/article/CongressIRS-Urged-to-Make/137157/