This is an announcement for the paper "Ideals of operators on $(\oplus \ell^\infty(n))_{\ell^1}$" by Denny H. Leung. Abstract: The unique maximal ideal in the Banach algebra $L(E)$, $E = (\oplus \ell^\infty(n))_{\ell^1}$, is identified. The proof relies on techniques developed by Laustsen, Loy and Read and a dichotomy result for operators mapping into $L^1$ due to Laustsen, Odell, Schlumprecht and Zs\'{a}k. Archive classification: math.FA Mathematics Subject Classification: 46L10, 46H10 Submitted from: matlhh@nus.edu.sg The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/1310.7352 or http://arXiv.org/abs/1310.7352