Here are the people who maintain Suspend2 enabled kernels and hibernate script packages for distributions....
Gentoo
Henrik Brix Andersen:
suspend2-sources package
suspend2-userui package
hibernate-script package
Debian
Martin Krafft:
kernel-patch-suspend2 package
Cameron Patrick (uploaded by Erich Schubert):
hibernate package
Ubuntu
Bernard Blackham:
Dapper packages
Generic (kernel.org) patches
Kernel patches suspend2.net
Userspace UI suspend2.net
Hibernate script suspend2.net