This is an announcement for the paper "An interpolatory estimate for the UMD-valued directional Haar projection" by R. Lechner. Abstract: We establish an vector-valued interpolatory estimate between directional Haar projections and Riesz transforms. Archive classification: math.FA The source file(s), images/ring_domain--contained_in_cube.eps: 34448 bytes images/ring_domain--cubes_contained_in_covering.eps: 34423 bytes images/ring_domain--cubes_in_between.eps: 34072 bytes images/ring_domain.eps: 29005 bytes images/shifting_a_strip.eps: 57908 bytes main.bbl: 5508 bytes main.tex: 91054 bytes, is(are) stored in gzipped form as 0902.3597.tar.gz with size 69kb. The corresponding postcript file %has gzipped size 197kb. Submitted from: lechner@bayou.uni-linz.ac.at The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/0902.3597 or http://arXiv.org/abs/0902.3597 or by email in unzipped form by transmitting an empty message with subject line uget 0902.3597 or in gzipped form by using subject line get 0902.3597 to: math@arXiv.org.