From the Linux.com article "Software patent abolition campaign will launch next month":
The current patent culture was challenged in 2005 when the Supreme Court heard LabCorp v. Metabolite, a case that turned on what Klemens calls "a pathetically trivial physical step." In the end, the Supreme Court did not issue a ruling due to technicalities peculiar to the case, but, as Klemens says, "It does indicate that the Supreme Court takes seriously the problem of drawing a line that says that some things we humans do should not be patentable." Klemens adds that "Every pundit I've met agrees that the Supreme Court is looking for a case to replace [LabCorp v. Metabolite].
[…]
"On the legislative front, we've seen a number of bills for patent reform get shot down in the last few years. Reform is desperately needed, but it is stalled — and it's because of soft patents that it is stalled. Once we restore a rule that not everything can be patented, the rest of patent reform will either fall into place naturally or be much easier to fix.
[…]
"The key tactic, and the one which I am putting the best odds on, is a case to replace [LabCorp v. Metabolite]. But we are also looking at our Congress, and looking for a means to ensure that people can write software based on their own ingenuity without risk of being sued."
Finally some movement against Software Patents in the US.