The Foundry has release Nuke and Nuke X 6.3 sporting some huge improvements and additions that include a new 3D particle (True 3D) that works seamlessly with the Nuke 3D workspace, a Planar Tracker, new Denoise technology built upon Furnace wavelet based algorithm, Grid and Spline Warping, Audio Scratch Track, a Displacement Shader, and the integration of Deep Compositing… which is a huge feature in itself.
check out a great overview of the new Nuke 6.3 over at FXguide, and also at The Foundry’s Page for Nuke / Nuke X 6.3.