I use OpenSSL in financial services. I've heard about this exploit, but I haven't switched to the 64 bit kernel yet on my AIX boxes due to a legacy issue with the database. The way I understood it was that the vulnerability was only present while using 64 bit kernel, although I could be wrong. We have physical safeguards in place to minimize our risk anyway.
Ooops, nevermind, wrong exploit. This is an intel issue. My warning was on PowerPC.
It looks to me like you'd have the problem if you shared the server with an untrusted party. If you have the server all to yourself, that's different.