Below are the newest and the best links I have found on house church:

Searching Together

New Testament Restoration Foundation

House to House   presented by the Chigwell Christian Fellowship

Other sites of interest

Below is a quote from the House to House web site I particularly like:

"Some call them house churches. Some call them organic churches. Some call them simple churches. We prefer to just call them churches. They are rapidly multiplying, simple communities of believers, meeting in homes, offices, campuses, wherever God is moving. This is the pattern common to many parts of the globe, and is now becoming more and more common in the U.S. as well.

Where are two or more are gathered in His name, there is church.

What we advocate has been termed house church, home church, simple church, family church, relational church, organic church, micro church and biblical church.

Whatever you call it, the idea is to be faithful to the intent of the original Apostles in our church life."