You can't overplay the importance of Matter, clubland's newest and grandest project, which launched its first club night last week in Greenwich's iconic former Millennium Dome, now The O2 arena. For a start it comes from the owners of Fabric, arguably the world's most successful and innovative club brand, in a year when other muchloved club venues have shut their doors. Second, it's both a live venue and a club space, custom-built to adapt to whoever is on the mouthwatering lineups that lie ahead. Third, it's south of the river.