Talk to me about d20 Psionics

[Turanil]

How extensive is the Psychic's Handbook notes on converting it to Modern? Is it just a sidebar with a few paragraphs, a entire section or chapter?

There is some previews and freebies to download on Green Ronin Publishing website about the Psychic Handbook. They give you some ideas as what it looks like and how it works; and there is a PDF about the advanced Psychic class for the D20 Modern game.