GoGo Penguin is one of my favorite new jazz trios. Definitely one of the leading groups in the new London jazz scene. Check out songs like Raven, Control Shift or GBFISYSIH.
Some more modern jazz piano trios
Since discovering Christian Pabst several years ago, I've been slowly expanding my catalog of good contemporary jazz piano trios. Among these include the absolutely fantastic Triosence and the equally melodious Yuko Mabuchi Trio. An older artist still putting out immaculately played and recorded albums is Steve Kuhn and his trio.
Any other suggestions?