I received the following e-mail from Yahoo!
We will officially discontinue Yahoo! MyBlogLog effective May 24, 2011. Your agreement with Yahoo!, to the extent that it applies to the Yahoo! MyBlogLog, will terminate on May 24, 2011.
The other social blogrolling service, BlogCatalog, became quite unusable about 5-6 months ago, so that's the end of that. I wonder if it's a sign that blogging itself is in decline?
Yahoo! has a long history of taking over useful online services and then abandoning them. First it was Webring, then Geocities, and now MyBlogLog. That means that the last useful service they maintain is their listserver, Yahoogroups. It's also something they took over from someone else, an outfit called e-Groups. If they abandon that, there'll be nothing left that will make it worth remaining a member of Yahoo!