IBM Websphere Portal Certification

[Nanditha Hebbar]

Hi,
I am working on Portals & content management...
I have recently passed SCJP certification.
I am now deciding whether I should take up next levels of developer certification from SUN or any certifications on portals like IBM Websphere portals certification or Weblogic Portals Certification.
Can anyone please advise me on the same ?

Also please let me know the Portals Certifications which carry more value in the industry...

Thanks!
Nanditha.