Test 701: IBM Lotus Notes Domino 7 Application Development Update
Test 702: IBM Lotus Notes Domino 7 System Administration Update

Consequently, the corresponding certifications will also be retired on that date. If you are working toward your Lotus Notes Domino 7 certification, be sure to schedule the tests while they are still available.

Update (thanks Fabrice C. for the link):

Due to a continued demand and high-volume, Lotus Certification is postponing the retirement of both IBM Lotus Notes and Domino 7 Update Exams until April 30th, 2009.  The previous date of December 31st, 2008 is no longer valid. Consequently, the corresponding certifications will also be available until April 30th, 2009.

See: http://www-03.ibm.com/certify/news/20080627.shtml for more informations.