Effectiveness of SecureID reduced?

It seems that RSA got attacked and might have lost some information. They actually took a really courageous step and went public and the Executive Chairman wrote an open letter. To quote:

While at this time we are confident that the information extracted does not enable a successful direct attack on any of our RSA SecurID customers, this information could potentially be used to reduce the effectiveness of a current two-factor authentication implementation as part of a broader attack.

and

We have no evidence that customer security related to other RSA products has been similarly impacted. We are also confident that no other EMC products were impacted by this attack. It is important to note that we do not believe that either customer or employee personally identifiable information was compromised as a result of this incident.

Roger