Same here and my membership ends June 30th. I just sent an email to Member Services. I will report back once I receive a reply.
Here it is: "You were selected as a member of our Preferred Research Panel based on your participation in the e-Rewards program during the preceding year. As a result, we waived our usual currency expiration rules for you and the e-Rewards currency that you earned as of June 30th was rolled over into this membership year.
We'll review your program participation and profile on your anniversary date June 30th and let you know if you re-qualify for Preferred Research Panel membership. If you re-qualify, your status as a member of the Preferred Research Panel may be extended for another year and the expiration date for e-Rewards currency you have earned would be extended for an additional membership year. Should you not re-qualify, your e-Rewards currency will be subject to expire on August 1, 2011.