I'll start and then ask my colleagues to help me out.
In brief, PIPEDA and the Privacy Act are quite different. PIPEDA applies to the private sector and its collection, use, and disclosure of personal information in the context of commercial activity. From a federal government perspective, that means specifically that the trade and commerce power is being applied as well. It applies to federally regulated industries, specifically, for example, to banks and telecom companies. The Privacy Act applies to federal governments and agencies and their handling of personal information.
These are quite different, and quite different in the sense of how the bills are conceived. PIPEDA is based on the concept of consent, generally requiring that an organization have the consent of the individual to collect, use, and disclose their personal information and based on the application of those principles that you'll find in the act. The Privacy Act is not based on consent, but instead is very prescriptive as to when and how federal institutions may collect information. No personal information, for example, shall be collected by a government institution unless it relates directly to an operating program or activity of the institution.
I'll conclude by saying that in the area of digital privacy, we feel that you need these principles and a balanced approach in order to take into account the changing technology. A balanced approach gives you the flexibility to still apply the rules, even though the hardware and the software are constantly changing, for example.