Once again, Slashdot links to a blog instead of the original source. The linked blog gets its evidence from a wiki page at http://www.elinux.org/Busybox_replacement_project
This page has a Q&A which clearly states that it is not a Sony project:
Q. Tim Bird, the proposer of this project, works for Sony. Is this a Sony project?
A. No. Although Tim is employed by Sony, he spends a portion of his employed time working on behalf of the embedded industry to improve Linux and encourage GPL compliance. As of February 2, 2012, Sony has not endorsed or agreed to support this project. This wiki page is for gathering information and project description information, to present to various companies to solicit support and resources for the project.
Q. Can Tim's creation of this proposal be used to infer anything about Sony's compliance record, future compliance intent, or other business practices?
A. Tim has only recently informed his management about this proposal, and Sony has not yet (as of 2/2/12) agreed to support it. So, "no, not really". Sony has a good compliance record, and has strong compliance policies in place. It has never been contacted by the SFC and has no expectation of being contacted by the SFC about any license violation of GPL software. Tim is doing this as part of his (paid for by Sony) role in the industry to address issues which inhibit the adoption of Linux in consumer electronics.