Most original new concept I've seen lately is in Charlie Fletcher's YA series 'Stone Heart', 'Iron Hand' and then 'Silver Tongue'. Bit Nevewhere-ish in that its set in London and real life sculptures start coming to life and becoming characters (books include maps and photos of said statues). Terrific.
You deifnately must read Graveyard Book, one of his best ever.

Other stuff not mentioned here includes:
Sherri Tepper - Gibbon's Decline and Fall, Family Tree
Kim Wilkins - Giants of the Frost, The Autumn Castle
Rachel Pollack - Uncontrollable Fire