Costolo and Mayer obviously know one another from their days together at Google ( GOOG). And Twitter is probably a better long-term partner for Yahoo! anyway.

Ultimately, they can help one another out during times of need. Mayer has kicked things off nicely, but she needs a strong platform -- outside of Yahoo! -- to push Flickr forward. And Flickr can pick up exactly where Instagram left off . . . and more.

So maybe I do endorse the idea after all.

--Written by Rocco Pendola in Santa Monica, Calif.
Rocco Pendola is TheStreet's Director of Social Media. Pendola's daily contributions to TheStreet frequently appear on CNBC and at various top online properties, such as Forbes.

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