The Nvidia usb 1.1 hanging bug is only present for full speed devices. Keyboards, mice and other low speed hardware are fine.
Full speed usb 1.1 devices like irda dongles, audio cards, ADSL modems will hang after few minutes of use.
You can include me in the group of people who don't have this problems. Maybe it's specific to a certain usb controller. Or maybe crappy hardware. I don't know. However, when this many people aren't experiencing the problem, it's probably wise to look for the root cause elsewhere. Maybe Nvidia never fixed it because it's not an Nvidia problem.