As an active certification taker, Its getting harder and harder to stay ahead of the new releases.
Since many have an expiration date of 3 years, and some are just replaced with new versions.
So far this year I’ve taken:
CCA Xenapp 6.5 (Which I plan to build further with CCAA)
CCNA Security (Which I plan to build further with CCNP Security, need to take 4 exams first)
CEH V7 (Schedulded on the 15th March)
So far I see that I have to replace my Windows Server certifications when the new version gets released. My ConfigMgr 07 gets replaced by SCCM 2012. SQL Server gets replaced when 2012 arrives.
I also see that CEH V8 is supposed to arrive soon, my Comptia certifications have a 3 year lifespan so I plan to take the CASP and extended to lifespan of all my Comptia exams.
The CCNP Security objectives just got updated, so I most likely have to get new books or update myself on what new objectives there are.
Not easy to keep yourself updates. But most of these companies have an educational twitter account that you can follow. And Most have their own certification site.
Citrix : http://www.citrixtraining.com/courses/certifications/
Comptia : http://certification.comptia.org/home.aspx
If you plan on taking any certifications, I suggest you take a look at this site. It might contain usefull information regarding the exam you plan to take.