Here is the link from the CMS website announcing the termination.
In cases of Plan Terminations, the member gets a Special Election into a new plan. This can be a PDP or an MAPD. I have an explanation of this type of SEP here. Non-Renewals refer to when a MCO does not renew a particular plan (like what happened with many PFFS plans this past year). Terminations are treated the same way, however, a termination can happen at any time during the year.
This SEP will run until 5/1/2010. Remember, the SEP is only one election. Once it is used, the SEP ends. Any members who do not choose a new plan will be assigned to a plan with Humana.