I was pretty happy in 2005 when IBM, in an obvious PR stunt to get buddy-buddy with the open source community, made its Statement of Non-Assertion of Named Patents Against OSS, ostensibly saying that it would permit open source projects to use any of the items covered by those patents without risk of penalty or lawsuit. Yay! Finally, a BigCo getting it and doing the right thing! But five years is a long time, people come and go, and promises can be forgotten. IBM has lately threatened to sue someone for infringement of a lot of IBM patents, including at least two that were included in the Non-Assertion statement.