are there any projects on line (or at least proposed) that could confirm this?

None I've seen. The only peculiarity about the planet I've seen is that its got one of the more elliptical orbits known. Other than that, its never been suspected as a binary planet. The only possible supposition is that its high eccentricity could be a statistical anomaly caused by two planets with resonant orbits that are actually circular, but even a tight resonant second planet that would have been seen in the error bars of the radial detection a long time ago if it existed.

I meant like Pluto-Charon. Any other prospects if for some reason this one is no good?

Nope, none so far. Except maybe that binary pair that's a might-be brown dwarf and a gas giant, though the planet purists will whine becase the gas giant formed in a stellar nursery, not a planetary disk.

No binary planets in a star system that I've heard of.

What made you think so?

At present, if I am not mistaken, the only way to identify a "real" binary planet is by transit method. When two planets are eclipsing each other (from our viewpoint), the drop in starlight will be less than usual, and when they are not the starlight will drop and return in two distinct steps.

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Fiction has to be plausible. Reality is under no such constraint.

I thought tides would be less for such a pair. If they were epistellar, there is no way they could be separate. Maybe a trojan terrestrial of a jovian could also be found bt the TPF, if it ever gets off the ground.