This latest patent that caused an uproar was filed in 1992, when the idea was definitely innovative. It just further goes to show that the 17 year span, at least, is too long for software.
I'm simply not convinced that the concept of an update button acting on the Internet was innovative - not when I could have sat down in high school and worked it out in a day, and when the very concept of an Internet makes it obvious. And yes, I was doing software in 1992 (finished college in '88), so I think I understand pretty damn well what was innovative at the time.
[Edit on re-reading: I couldn't have sat down in high school and done this in a day because I had never heard of the Internet in 1980-1984, but I could have made it work against Compuserve.]
This, like every other "patent on three hours' work", is nothing more than parasitic rent-seeking behavior, and it is anathema to the vitality of our economy. Lodsys should be deeply ashamed of trying to present this as a "solution" when they clearly simply want to profit from the work of others.