Open Signed, has updated and replaced Developer Certificate signing, making it easy for developers to sign applications for limited deployment to known devices, either for testing or for personal use. The online-only option is coming soon.
Express Signed, a new option similar to Self Certification, is available to all developers, either directly (for those who own a Publisher ID), or via publisher partners (for those who do not).
Certified Signed, has updated and replaced the mainstream signing option based on independent testing by a Symbian accredited Test House.
TCTrustCenter, www.trustcenter.de/order/publisherid/dev, is the Certificate Authority for Symbian Signed, responsible for issuing and validating Publisher ID digital certificates (but existing ACS Publisher Certificates issued by VeriSign will remain valid for Open Signed and Certified Signed).