Thats a dumb argument. Am2 boards can be used for a frisbee at this point as well, and AM2+ boards are rapidly approaching that point as well the only thing thats saving SOME of them is bios updates for AM3 support. But as DDR3 becomes more popular, AM2+ will die as well.
All AM2 and AM2+ cpu's are pretty much junk at this point. The 940 being the only decent AM2+ cpu left worth breaking out an AM2+ board for.
Never said they would not. AM3 will be a frisbee in a few years. So will 1156. Whats the argument, unless you just want one, go for it.