This article from October tells you what Yahoo is up to with their new project Panama which is going live in the first quarter
http://news.com.com/Yahoo+earnings+d...3-6126858.html
Having checked out the Panama website I believe that our beloved overture keyword tool will still exist. However, I suspect that Yahoo may have plans for it to be accessible only to advertisers. See below from the Panama Tips page.
Top 5 guidelines for creating keywords
Exclude keywords and keyword combinations that explicitly describe a direct online purchase (e.g. “online shop” or “buy online”).
Try to predict what your customers will type in when searching for the service or product you offer.
Choose a wide range of keywords that may generate enough leads to follow up on or create a sufficient database for your follow-up.
Take into account keywords with multiple words (“large format print for storefront”).
Periodically add new keywords and remove the non-performers to keep your account administration at a manageable level
Use the Keyword Research Tool of the “add keyword” wizard in your account.