I got the Maemo SDK installed on Fedora 9. The instructions are pretty complete.
First, Scratchbox needs the compat VDSO mode enabled. This is done by echo 0 > /proc/sys/vm/vdso_enabled. Also, Qemu requires mmap_min_addr set to 4096. These can be set permanently by adding the following lines to /etc/sysctl.conf.
# scratchbox support vm.vdso_enabled = 0 vm.mmap_min_addr = 4096
On [...]