The vulnerability is likely not to affect desktop users anyway, since most applications that use OpenSSL are server or remote access applications. If you use SSH, you'll want to regenerate your keys though.
See this page for details on affected apps and how to perform the key rollover:
http://www.debian.org/security/key-rollover/
Applications like Firefox (Iceweasel on Debian) aren't affected as they use a different crypto library.