A discussion is going on at the symbian.org. It looks like a new symbain signed rules are in the work (my guess they will be implemented no earlier than symbian^4). Symbian signed may become cheaper and a new class of publisher ID may become available for anyone with a credit card.
David Wood from Symbian Foundation answered a question about Symbian Signed (mandatory digital signature for all Symbian OS app with advanced capabilities) in comments to his blog post about Symbian Release Plan :
“>What about Symbian Signed? Are there any plans to drop it, or at least relax it…?
A number of options for improving the operation of Symbian Signed are under active consideration.”
So it seems Symbian foundation is hearing to developers and end users lamentation and things could be better soon.