Brett Yount from the Bing Webmaster Team dropped a hint in the Bing Forums that they may add the Bing Page Score (similar to Google’s PageRank) to the MSN Toolbar.

Bing has what they call Bing Page Score when you login to their Bing Webmaster Center. Someone asked in the thread, “is it possible to enable page rank in bing toolbar?”

Soon after, Brett Yount from Bing responded saying:

So there are two things here:

(1) Bing’s Page Score may come to their Toolbar.
(2) They will be reworking “that tool,” which I believe is talking about Page Score specifically.

Forum discussion at Bing Forums.