I've launched Congresser.com in the United States. The idea behind the service is that government action should be push not pull. Everyone affected by a law, regulation or decision should hear about it when it's being considered if possible and definitely when it takes effect. It builds on my Federal and Ontario-level services in Canada.
Congresser works by monitoring for client keywords in a variety of Congressional and Whitehouse data sources (e.g. Congressional Record, Congressional Reports, Federal Registry, etc.).