I tried to access the RootsWeb SSDI today and got the following message:

"Due to sensitivities around the information in this database, the Social Security Death Index collection is not available on our free Rootsweb service but is accessible to search on Ancestry.com. Visit the Social Security Death Index page to be directly connected to this collection"

I guess ancestry.com has taken over another resource. The search function on Ancestry does no seem to be nearly as easy and useful as the one that was on Rootsweb. Too bad.