Kenai is Sun’s connected developer destination. It is a integrated suite of developer services where you can host your open source projects. Currently the following features are supported:

• Source Code Management (Subversion, Mercurial, and Git)
• Issue Tracking (Jira and Bugzilla)
• Wiki
• Forums
• Mailing Lists
• Download facility for documents
• Evolving integration with NetBeans

When you create an account at Kenai, you can host up to five projects for free. I imported two of my hobby projects to try it out, and I liked it. See wikipedia for a comparison of open source software hosting facilities.