Matti Hemmings updated his website this week. While a still bits and pieces are still under construction you can already find lots of details on the different kinds of shows Matti is offering. That guy is busy!
By the way Matti is not the only rider offering professional BMX flatland shows. If you are organizing a show then you may want to check Deep BMX's, Chris Böhm's or Matt Wilhelm's website as well. Just to name a few..