A PC World article reports that though OS/2 has enjoyed years of success in key niches such as automated banking and airline systems, those days may be numbered as Microsoft targets those markets with Windows XP. OS/2 has virtually disappeared from the desktops of all but an elite hard-core group of enthusiasts, but its stability made it popular for devices like ATMs. With IBM's support for OS/2 having waned years ago, things are looking pretty grim for its continued existence as a live product.
Some OS/2 fans are circulating a petition asking IBM to open the OS/2 source code. You can sign it here. Though IBM has become a good neighbor in the open source community, there are sometime tricky issues involved in open sourcing commercial software. For instance, IBM's one-time collaborator in OS/2, Microsoft, may still own some of the OS/2 technology, and may not want to see it open sourced. Nevertheless, make your voice heard. It can't hurt.