This feature is available in all editions.
No. The Heartbleed vulnerability was publicly disclosed on Monday, 4/7/14. It involves a serious security flaw with specific versions of OpenSSL.
The VersionOne application itself does not use OpenSSL at all, so it was not impacted. In our hosting environment we use F5 Load Balancers for SSL which were using a non-affected version of OpenSSL (v0.9.8e) at the time the vulnerability was uncovered, so also not impacted.
For additional in-depth technical information regarding this issue, contact VersionOne Support.