Posted here is the current upgrade diagram for R75, R76 and R77. With Check Point no longer supporting R70 and R71, the upgrade diagram has simplified…for now.
Heartbleed CVE-2014-0160 and Check Point
Check Point just updated SK 100173 which references the new OpenSSL vulnerability. According to the SK article the following products are not affected: Security Gateway Security Management Server Multi-Domain Security Management Server Endpoint Security Management Server Endpoint Connect clients SSL