GlobalSign has offered to give a free wildcard SSL certificate for qualified open source projects, as a way of supporting open source and as a way to encourage adoption of industry best practices.

The project must have an OSI-approved license, be actively maintained, be non-commercial, and pass some simple requirements, all of which are desirable conditions.

The use of SSL protects user and data from easy exploitation and interception; it's not a simple band-aid for security, but is certainly a first step towards addressing security and privacy concerns.

It's not clear from the web page whether this is a limited endeavor or not; it's still worthwhile, especially since SSL certificates can range from $50/year (for one vendor's offering) to thousands per year.