[Balloon] stoneboat upgrade

Hullo,

Quick administrative mail. The server that hosts the Balloon website
and YAFFS git repository is due to be upgraded from lenny->squeeze
today. Any disruption to services should be minimal, but the server
will be going down for a reboot after upgrade.

I'm also planning on turning off the YAFFS cvs server now that the
migration to git has settled in, so the old, frozen code will no
longer be accessible via cvs. All balloons should now be using the
git repository.

Thanks,
Jenny