Quoting Miller:

>Should theoretically work on Mac too, but I don't have any 2+-processor
>mac to try it on.  Probably does nothing on windows.

In Windows XP SP3, 32 bit, using the following puredata:

D:\XP32\Program Files\pd\bin>pd -version

Pd version 0.41-4extended

compiled 03:33:30 Jun  4 2009

The -nosleep fills one CPU entirely. So seems to be working. The system is the same I've reported above for Ubuntu 9.10.