As some of you may have already noticed the CAcert root certificate recently got included with the Nokia 770. I take this as a sign that Nokia might accept the CAcert root certificate also for mobile phones in the near future. This could provide developers with access to free code signing certificates.
CAcert is based on a Web-Of-Trust. This means that after a person gains the highest trust level CAcert will issue code signing certificates to that person. All certificates are free of charge.
The Web-Of-Trust process of Assurances where other WOT members verify ones Identity is free of charge in most cases. A person might charge for that, but most don't. Of course buying someone a beer is an good argument for an short assurance meeting.
AFAICT the WOT is spreading at a high pace throughout the world. Very active countries are Germany, The Netherlands, Australia, USA, ...
Just thought you might be interested. As for now code signing certificates seem to be quite an expensive thing.