What yahoo! search subscriptions is

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Yahoo! Search Subscriptions is a search engine within Yahoo! that only searches subscription sites. It’s a little like a site search feature for several sites at once. When you arrive, you’re asked to click on any of the seven sites that Yahoo! can focus your search on:

Consumer Reports
FT.com
Forrester Research
IEEE publications
New England Journal of Medicine
TheStreet.com
Wall Street Journal
If you have a subscription to the sites that you’re searching, then you can proceed to those sites as you would from a typical SERP. If you don’t have a subscription to those publications, then you’ll end up on a page that says “this page only available to subscribers.”

In an aside in a recent instillation of my colleague Kevin Lee’s ClickZ column, Lee argued that what’s really happening here is the beginning of a variation on the much talked-about Google Wallet. I want to ignore that speculation for a moment, though, and take Yahoo! Search Subscriptions at face value.