Today Yahoo posted news that its search engine spider, Slurp will now resolve from a different domain:

So what does this mean to you? Likely nothing unless you have some custom access filters setup for spiders. Priyank Garg of Yahoo noted that “if you do any reverse DNS checks for the crawler identity or have any network access rules to allow, please also update them to allow for”

The change will be incremental so it is important to provide access to both domains until the transition is complete.