Here it is – On One Map – http://ononemap.com/
At last someone has integrated Google Maps with estate agents’ feed in the UK. Whilst there has been a mashup of US craigslist and google maps for a while, this is the first time i’ve seen it done in the UK. It get its’ detail from a variety of sources – findaproperty, rightmove, primelocation, etc. Although it doesn’t have my house.