At this writing (13 Feb 2013) I estimate that the time to fix this will likely be at least days, but potentially weeks or even months, due to my other commitments.
Until we have a solution to this problem, you might want to use the Listserv-hosted archives for SS-L.
The Listserv archives are nice in many ways, most notably that they are updated quickly -- you can see in the archives messages from today as they roll in. Unfortunately, these archives cover only a limited time period (the most recent 12 months). The Dry.Org archive is less current, but more complete (as it goes back to 1995). But right now, the Listserv archive is the only one that works!
The Listserv archives have some interesting functionality (if you can puzzle out the various icons that control grouping by person, subject or date, and reverse or forward ordering).
The first time you visit the Listserv Archives, you will be faced with a demand for a password. This is a specific password for the Listserv server at illinois.edu, unrelated to the Dry.Org archives password. Unless you have already set up a password at listserv.illinois.edu for some other reason, you will want to look for and click on the underlined text "get a new LISTSERV password" just above the prompt box for your E-Mail address. In your dealings with Listserv, provide the email address under which you are subscribed to SS-L.
I will do what I can to ensure that the Dry.Org multi-year archives do come back and that there is no gap in the message history. -- David Dryden