In some cases we've been building tools that are specific to Linux for the desktop, and they only work on Linux, but I see two major projects that are wildly, wildly successful: Mozilla and OpenOffice, and those two programs are cross platform. ↗
There's a way in which these guys all think absolutely media, day and night. Access is what it's all about, so they spin 24 hours a day and that's a problem. ↗