A Search Engine Watch Forums thread has hearsay on Yahoo working on a new keyword tool that will show search volume data.
This has been sorely missed since Yahoo stopped updating the Overture Keyword Suggestion tool with search volume data.
I was talking to a rep at Yahoo! and voicing my concern about the removal of the Keyword Selector Tool removal and reinstatement. She told me that they are currently working on a new version of the tool that will retain the keyword search volume and introduce some more robust functionality as well.
But at the same time, a "platinum rep" told someone else that "thinking" about it, but have nothing started yet.
I personally have not heard more outside of what I posted here the other day. So I doubt they are currently working on a new keyword tool at this moment.
Forum discussion at Search Engine Watch Forums.