As of today, Sylverant will be licensed under the GNU Affero GPL v3, rather than the normal GNU GPL v3. This change is to protect the rights of all users of Sylverant servers, no matter where they happen to be hosted. Basically, the AGPL differs from the GPL in one simple area: the AGPL ensures that users that use the server software hosted on any machine can get access to the source code of the software. The standard GPL does not compel people who host networked software (like Sylverant) to provide an offer for the source to clients using the source, the AGPL does. Thus, the AGPL is actually a much more sane choice for network server software than is the normal GPL.
This is actually something I had been planning to do for a long while, and finally got around to doing today…