Crossroads' morning service is called Crossroads House and we hope there to embrace the advantages of house churches. Tim Chester has an interesting post on this, arguing that every Christian should sit in on the church meeting and be able to think 'I could do this'.
I am not convinced that this is the only way or the best way for churches to be. After all, Crossroads has more traditional styles of church meeting too. But I think it is a form of church that has some clear advantages.