If you're in the mad scramble to patch the Heartbleed vulnerability in OpenSSL on your Ubuntu servers but you need to see some documentation, look in your /usr/share/doc/openssl/changelog.Debian.gz file. If you see the following at the very top of the file, you're patched:

  openssl (1.0.1-4ubuntu5.12) precise-security; urgency=medium
  
    * SECURITY UPDATE: side-channel attack on Montgomery ladder implementation
      - debian/patches/CVE-2014-0076.patch: add and use constant time swap in
        crypto/bn/bn.h, crypto/bn/bn_lib.c, crypto/ec/ec2_mult.c,
        util/libeay.num.
      - CVE-2014-0076
    * SECURITY UPDATE: memory disclosure in TLS heartbeat extension …