Two things are odd here, these are also facts not rumours.
1. Nesta was a sitting in the Impact booth.
2. He was with Corradi and Ferrari.
Now I could be totally wrong but I would think there would never be a chance in hell that the Impact would let TFC invite Alessandro Nesta to a match in Montreal and then sit him in the Impact booth with two Impact players. I want this Nesta rumour to be true but everything points it to not being true. The blog post states two player agents said its "highly likely" Nesta would sign with TFC and that an Impact insider said he was a guest of Toronto. Doesn't sound too promising to me.