Starting Sunday HL will be receiving a series of major upgrades. On Sunday this will affect the availability of the site -- if all goes well, for perhaps a few minutes at most, and if not, for probably no more than half an hour. Upgrades after Sunday should have no effect on the site itself, being primarily administrative.

UPDATE: The major upgrade seems to have been successful; there will be minor tweaks and upgrades throughout the week. As stated above, however, they should not affect the site itself.

UPDATE 2: On further thought, there will be one more major upgrade that will affect service; further information to follow.